diff --git a/src/features/inventory/api/inventory.api.ts b/src/features/inventory/api/inventory.api.ts
new file mode 100644
index 0000000..a8aa8c2
--- /dev/null
+++ b/src/features/inventory/api/inventory.api.ts
@@ -0,0 +1,204 @@
+import { api } from '@services/api/axios-instance';
+import type {
+  StockLevel,
+  StockMovement,
+  StockSearchParams,
+  MovementSearchParams,
+  CreateStockMovementDto,
+  AdjustStockDto,
+  TransferStockDto,
+  ReserveStockDto,
+  StockLevelsResponse,
+  MovementsResponse,
+  Warehouse,
+  CreateWarehouseDto,
+  UpdateWarehouseDto,
+  WarehousesResponse,
+  Location,
+  CreateLocationDto,
+  UpdateLocationDto,
+  LocationsResponse,
+} from '../types';
+
+const STOCK_URL = '/api/v1/inventory/stock';
+const MOVEMENTS_URL = '/api/v1/inventory/movements';
+const WAREHOUSES_URL = '/api/v1/warehouses';
+const LOCATIONS_URL = '/api/v1/inventory/locations';
+
+export const inventoryApi = {
+  // ==================== Stock Levels ====================
+
+  // Get stock levels with filters
+  getStockLevels: async (params?: StockSearchParams): Promise<StockLevelsResponse> => {
+    const searchParams = new URLSearchParams();
+    if (params?.productId) searchParams.append('productId', params.productId);
+    if (params?.warehouseId) searchParams.append('warehouseId', params.warehouseId);
+    if (params?.locationId) searchParams.append('locationId', params.locationId);
+    if (params?.lotNumber) searchParams.append('lotNumber', params.lotNumber);
+    if (params?.hasStock !== undefined) searchParams.append('hasStock', String(params.hasStock));
+    if (params?.lowStock !== undefined) searchParams.append('lowStock', String(params.lowStock));
+    if (params?.page) searchParams.append('page', String(params.page));
+    if (params?.limit) searchParams.append('limit', String(params.limit));
+
+    const response = await api.get<StockLevelsResponse>(`${STOCK_URL}?${searchParams.toString()}`);
+    return response.data;
+  },
+
+  // Get stock by product
+  getStockByProduct: async (productId: string): Promise<StockLevel[]> => {
+    const response = await api.get<StockLevel[]>(`${STOCK_URL}/product/${productId}`);
+    return response.data;
+  },
+
+  // Get stock by warehouse
+  getStockByWarehouse: async (warehouseId: string): Promise<StockLevel[]> => {
+    const response = await api.get<StockLevel[]>(`${STOCK_URL}/warehouse/${warehouseId}`);
+    return response.data;
+  },
+
+  // Get available stock for a product in a warehouse
+  getAvailableStock: async (productId: string, warehouseId: string): Promise<number> => {
+    const response = await api.get<{ available: number }>(`${STOCK_URL}/available/${productId}/${warehouseId}`);
+    return response.data.available;
+  },
+
+  // ==================== Stock Movements ====================
+
+  // Get movements with filters
+  getMovements: async (params?: MovementSearchParams): Promise<MovementsResponse> => {
+    const searchParams = new URLSearchParams();
+    if (params?.movementType) searchParams.append('movementType', params.movementType);
+    if (params?.productId) searchParams.append('productId', params.productId);
+    if (params?.warehouseId) searchParams.append('warehouseId', params.warehouseId);
+    if (params?.status) searchParams.append('status', params.status);
+    if (params?.referenceType) searchParams.append('referenceType', params.referenceType);
+    if (params?.referenceId) searchParams.append('referenceId', params.referenceId);
+    if (params?.fromDate) searchParams.append('fromDate', params.fromDate);
+    if (params?.toDate) searchParams.append('toDate', params.toDate);
+    if (params?.page) searchParams.append('page', String(params.page));
+    if (params?.limit) searchParams.append('limit', String(params.limit));
+
+    const response = await api.get<MovementsResponse>(`${MOVEMENTS_URL}?${searchParams.toString()}`);
+    return response.data;
+  },
+
+  // Get movement by ID
+  getMovementById: async (id: string): Promise<StockMovement> => {
+    const response = await api.get<StockMovement>(`${MOVEMENTS_URL}/${id}`);
+    return response.data;
+  },
+
+  // Create movement
+  createMovement: async (data: CreateStockMovementDto): Promise<StockMovement> => {
+    const response = await api.post<StockMovement>(MOVEMENTS_URL, data);
+    return response.data;
+  },
+
+  // Confirm movement
+  confirmMovement: async (id: string): Promise<StockMovement> => {
+    const response = await api.post<StockMovement>(`${MOVEMENTS_URL}/${id}/confirm`);
+    return response.data;
+  },
+
+  // Cancel movement
+  cancelMovement: async (id: string): Promise<StockMovement> => {
+    const response = await api.post<StockMovement>(`${MOVEMENTS_URL}/${id}/cancel`);
+    return response.data;
+  },
+
+  // ==================== Stock Operations ====================
+
+  // Adjust stock
+  adjustStock: async (data: AdjustStockDto): Promise<StockMovement> => {
+    const response = await api.post<StockMovement>(`${STOCK_URL}/adjust`, data);
+    return response.data;
+  },
+
+  // Transfer stock between warehouses
+  transferStock: async (data: TransferStockDto): Promise<StockMovement> => {
+    const response = await api.post<StockMovement>(`${STOCK_URL}/transfer`, data);
+    return response.data;
+  },
+
+  // Reserve stock
+  reserveStock: async (data: ReserveStockDto): Promise<{ success: boolean }> => {
+    const response = await api.post<{ success: boolean }>(`${STOCK_URL}/reserve`, data);
+    return response.data;
+  },
+
+  // Release reservation
+  releaseReservation: async (productId: string, warehouseId: string, quantity: number): Promise<{ success: boolean }> => {
+    const response = await api.post<{ success: boolean }>(`${STOCK_URL}/release`, {
+      productId,
+      warehouseId,
+      quantity,
+    });
+    return response.data;
+  },
+
+  // ==================== Warehouses ====================
+
+  // Get all warehouses
+  getWarehouses: async (page?: number, limit?: number): Promise<WarehousesResponse> => {
+    const params = new URLSearchParams();
+    if (page) params.append('page', String(page));
+    if (limit) params.append('limit', String(limit));
+
+    const response = await api.get<WarehousesResponse>(`${WAREHOUSES_URL}?${params.toString()}`);
+    return response.data;
+  },
+
+  // Get warehouse by ID
+  getWarehouseById: async (id: string): Promise<Warehouse> => {
+    const response = await api.get<Warehouse>(`${WAREHOUSES_URL}/${id}`);
+    return response.data;
+  },
+
+  // Create warehouse
+  createWarehouse: async (data: CreateWarehouseDto): Promise<Warehouse> => {
+    const response = await api.post<Warehouse>(WAREHOUSES_URL, data);
+    return response.data;
+  },
+
+  // Update warehouse
+  updateWarehouse: async (id: string, data: UpdateWarehouseDto): Promise<Warehouse> => {
+    const response = await api.patch<Warehouse>(`${WAREHOUSES_URL}/${id}`, data);
+    return response.data;
+  },
+
+  // Delete warehouse
+  deleteWarehouse: async (id: string): Promise<void> => {
+    await api.delete(`${WAREHOUSES_URL}/${id}`);
+  },
+
+  // ==================== Locations ====================
+
+  // Get locations by warehouse
+  getLocationsByWarehouse: async (warehouseId: string): Promise<LocationsResponse> => {
+    const response = await api.get<LocationsResponse>(`${LOCATIONS_URL}?warehouseId=${warehouseId}`);
+    return response.data;
+  },
+
+  // Get location by ID
+  getLocationById: async (id: string): Promise<Location> => {
+    const response = await api.get<Location>(`${LOCATIONS_URL}/${id}`);
+    return response.data;
+  },
+
+  // Create location
+  createLocation: async (data: CreateLocationDto): Promise<Location> => {
+    const response = await api.post<Location>(LOCATIONS_URL, data);
+    return response.data;
+  },
+
+  // Update location
+  updateLocation: async (id: string, data: UpdateLocationDto): Promise<Location> => {
+    const response = await api.patch<Location>(`${LOCATIONS_URL}/${id}`, data);
+    return response.data;
+  },
+
+  // Delete location
+  deleteLocation: async (id: string): Promise<void> => {
+    await api.delete(`${LOCATIONS_URL}/${id}`);
+  },
+};
diff --git a/src/features/inventory/index.ts b/src/features/inventory/index.ts
new file mode 100644
index 0000000..e7b74bc
--- /dev/null
+++ b/src/features/inventory/index.ts
@@ -0,0 +1,2 @@
+export * from './api/inventory.api';
+export * from './types';
diff --git a/src/features/inventory/types/index.ts b/src/features/inventory/types/index.ts
new file mode 100644
index 0000000..128dded
--- /dev/null
+++ b/src/features/inventory/types/index.ts
@@ -0,0 +1 @@
+export * from './inventory.types';
diff --git a/src/features/inventory/types/inventory.types.ts b/src/features/inventory/types/inventory.types.ts
new file mode 100644
index 0000000..d8b19e2
--- /dev/null
+++ b/src/features/inventory/types/inventory.types.ts
@@ -0,0 +1,223 @@
+export type MovementType = 'receipt' | 'shipment' | 'transfer' | 'adjustment' | 'return' | 'production' | 'consumption';
+export type MovementStatus = 'draft' | 'confirmed' | 'cancelled';
+
+export interface StockLevel {
+  id: string;
+  tenantId: string;
+  productId: string;
+  warehouseId: string;
+  locationId?: string | null;
+  lotNumber?: string | null;
+  serialNumber?: string | null;
+  quantityOnHand: number;
+  quantityReserved: number;
+  quantityAvailable: number;
+  quantityIncoming: number;
+  quantityOutgoing: number;
+  unitCost?: number | null;
+  totalCost?: number | null;
+  lastMovementAt?: string | null;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface StockMovement {
+  id: string;
+  tenantId: string;
+  movementNumber: string;
+  movementType: MovementType;
+  productId: string;
+  sourceWarehouseId?: string | null;
+  sourceLocationId?: string | null;
+  destWarehouseId?: string | null;
+  destLocationId?: string | null;
+  quantity: number;
+  unitCost?: number | null;
+  totalCost?: number | null;
+  lotNumber?: string | null;
+  serialNumber?: string | null;
+  expiryDate?: string | null;
+  reason?: string | null;
+  notes?: string | null;
+  referenceType?: string | null;
+  referenceId?: string | null;
+  status: MovementStatus;
+  confirmedAt?: string | null;
+  confirmedBy?: string | null;
+  createdBy?: string | null;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface StockSearchParams {
+  productId?: string;
+  warehouseId?: string;
+  locationId?: string;
+  lotNumber?: string;
+  hasStock?: boolean;
+  lowStock?: boolean;
+  page?: number;
+  limit?: number;
+}
+
+export interface MovementSearchParams {
+  movementType?: MovementType;
+  productId?: string;
+  warehouseId?: string;
+  status?: MovementStatus;
+  referenceType?: string;
+  referenceId?: string;
+  fromDate?: string;
+  toDate?: string;
+  page?: number;
+  limit?: number;
+}
+
+export interface CreateStockMovementDto {
+  movementType: MovementType;
+  productId: string;
+  sourceWarehouseId?: string;
+  sourceLocationId?: string;
+  destWarehouseId?: string;
+  destLocationId?: string;
+  quantity: number;
+  unitCost?: number;
+  lotNumber?: string;
+  serialNumber?: string;
+  expiryDate?: string;
+  reason?: string;
+  notes?: string;
+  referenceType?: string;
+  referenceId?: string;
+}
+
+export interface AdjustStockDto {
+  productId: string;
+  warehouseId: string;
+  locationId?: string;
+  lotNumber?: string;
+  serialNumber?: string;
+  newQuantity: number;
+  reason?: string;
+  notes?: string;
+}
+
+export interface TransferStockDto {
+  productId: string;
+  sourceWarehouseId: string;
+  sourceLocationId?: string;
+  destWarehouseId: string;
+  destLocationId?: string;
+  quantity: number;
+  lotNumber?: string;
+  serialNumber?: string;
+  notes?: string;
+}
+
+export interface ReserveStockDto {
+  productId: string;
+  warehouseId: string;
+  locationId?: string;
+  lotNumber?: string;
+  quantity: number;
+  referenceType?: string;
+  referenceId?: string;
+}
+
+export interface StockLevelsResponse {
+  data: StockLevel[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}
+
+export interface MovementsResponse {
+  data: StockMovement[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}
+
+// Warehouse types
+export interface Warehouse {
+  id: string;
+  tenantId: string;
+  code: string;
+  name: string;
+  warehouseType: 'main' | 'transit' | 'customer' | 'supplier' | 'virtual';
+  address?: Record<string, any> | null;
+  isActive: boolean;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface CreateWarehouseDto {
+  code: string;
+  name: string;
+  warehouseType?: 'main' | 'transit' | 'customer' | 'supplier' | 'virtual';
+  address?: Record<string, any>;
+}
+
+export interface UpdateWarehouseDto {
+  code?: string;
+  name?: string;
+  warehouseType?: 'main' | 'transit' | 'customer' | 'supplier' | 'virtual';
+  address?: Record<string, any> | null;
+  isActive?: boolean;
+}
+
+export interface WarehousesResponse {
+  data: Warehouse[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}
+
+// Location types
+export interface Location {
+  id: string;
+  tenantId: string;
+  warehouseId: string;
+  code: string;
+  name: string;
+  locationType: 'internal' | 'view' | 'supplier' | 'customer' | 'inventory' | 'production' | 'transit';
+  parentId?: string | null;
+  isActive: boolean;
+  createdAt: string;
+  updatedAt: string;
+}
+
+export interface CreateLocationDto {
+  warehouseId: string;
+  code: string;
+  name: string;
+  locationType?: 'internal' | 'view' | 'supplier' | 'customer' | 'inventory' | 'production' | 'transit';
+  parentId?: string;
+}
+
+export interface UpdateLocationDto {
+  code?: string;
+  name?: string;
+  locationType?: 'internal' | 'view' | 'supplier' | 'customer' | 'inventory' | 'production' | 'transit';
+  parentId?: string | null;
+  isActive?: boolean;
+}
+
+export interface LocationsResponse {
+  data: Location[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}
diff --git a/src/features/invoices/api/invoices.api.ts b/src/features/invoices/api/invoices.api.ts
new file mode 100644
index 0000000..34ce07b
--- /dev/null
+++ b/src/features/invoices/api/invoices.api.ts
@@ -0,0 +1,138 @@
+import { api } from '@services/api/axios-instance';
+import type {
+  Invoice,
+  CreateInvoiceDto,
+  UpdateInvoiceDto,
+  InvoiceFilters,
+  InvoicesResponse,
+  InvoiceStats,
+} from '../types';
+
+const BASE_URL = '/api/v1/invoices';
+
+export const invoicesApi = {
+  // Get all invoices with filters
+  getAll: async (filters?: InvoiceFilters): Promise<InvoicesResponse> => {
+    const params = new URLSearchParams();
+    if (filters?.search) params.append('search', filters.search);
+    if (filters?.invoiceType) params.append('invoiceType', filters.invoiceType);
+    if (filters?.invoiceContext) params.append('invoiceContext', filters.invoiceContext);
+    if (filters?.status) params.append('status', filters.status);
+    if (filters?.partnerId) params.append('partnerId', filters.partnerId);
+    if (filters?.dateFrom) params.append('dateFrom', filters.dateFrom);
+    if (filters?.dateTo) params.append('dateTo', filters.dateTo);
+    if (filters?.page) params.append('page', String(filters.page));
+    if (filters?.limit) params.append('limit', String(filters.limit));
+    if (filters?.sortBy) params.append('sortBy', filters.sortBy);
+    if (filters?.sortOrder) params.append('sortOrder', filters.sortOrder);
+
+    const response = await api.get<InvoicesResponse>(`${BASE_URL}?${params.toString()}`);
+    return response.data;
+  },
+
+  // Get invoice by ID
+  getById: async (id: string): Promise<Invoice> => {
+    const response = await api.get<Invoice>(`${BASE_URL}/${id}`);
+    return response.data;
+  },
+
+  // Create invoice
+  create: async (data: CreateInvoiceDto): Promise<Invoice> => {
+    const response = await api.post<Invoice>(BASE_URL, data);
+    return response.data;
+  },
+
+  // Update invoice
+  update: async (id: string, data: UpdateInvoiceDto): Promise<Invoice> => {
+    const response = await api.patch<Invoice>(`${BASE_URL}/${id}`, data);
+    return response.data;
+  },
+
+  // Delete invoice
+  delete: async (id: string): Promise<void> => {
+    await api.delete(`${BASE_URL}/${id}`);
+  },
+
+  // Validate invoice (change status from draft to validated)
+  validate: async (id: string): Promise<Invoice> => {
+    const response = await api.post<Invoice>(`${BASE_URL}/${id}/validate`);
+    return response.data;
+  },
+
+  // Send invoice
+  send: async (id: string): Promise<Invoice> => {
+    const response = await api.post<Invoice>(`${BASE_URL}/${id}/send`);
+    return response.data;
+  },
+
+  // Record payment
+  recordPayment: async (id: string, data: {
+    amount: number;
+    paymentMethod: string;
+    paymentReference?: string;
+    paymentDate?: string;
+  }): Promise<Invoice> => {
+    const response = await api.post<Invoice>(`${BASE_URL}/${id}/payment`, data);
+    return response.data;
+  },
+
+  // Cancel invoice
+  cancel: async (id: string, reason?: string): Promise<Invoice> => {
+    const response = await api.post<Invoice>(`${BASE_URL}/${id}/cancel`, { reason });
+    return response.data;
+  },
+
+  // Void invoice
+  void: async (id: string, reason?: string): Promise<Invoice> => {
+    const response = await api.post<Invoice>(`${BASE_URL}/${id}/void`, { reason });
+    return response.data;
+  },
+
+  // Get invoice stats
+  getStats: async (tenantId?: string): Promise<InvoiceStats> => {
+    const params = tenantId ? `?tenantId=${tenantId}` : '';
+    const response = await api.get<InvoiceStats>(`${BASE_URL}/stats${params}`);
+    return response.data;
+  },
+
+  // Generate PDF
+  generatePdf: async (id: string): Promise<Blob> => {
+    const response = await api.get(`${BASE_URL}/${id}/pdf`, {
+      responseType: 'blob',
+    });
+    return response.data;
+  },
+
+  // Download PDF
+  downloadPdf: async (id: string, fileName?: string): Promise<void> => {
+    const blob = await invoicesApi.generatePdf(id);
+    const url = window.URL.createObjectURL(blob);
+    const link = document.createElement('a');
+    link.href = url;
+    link.download = fileName || `invoice-${id}.pdf`;
+    document.body.appendChild(link);
+    link.click();
+    document.body.removeChild(link);
+    window.URL.revokeObjectURL(url);
+  },
+
+  // Get sales invoices
+  getSales: async (filters?: Omit<InvoiceFilters, 'invoiceType'>): Promise<InvoicesResponse> => {
+    return invoicesApi.getAll({ ...filters, invoiceType: 'sale' });
+  },
+
+  // Get purchase invoices
+  getPurchases: async (filters?: Omit<InvoiceFilters, 'invoiceType'>): Promise<InvoicesResponse> => {
+    return invoicesApi.getAll({ ...filters, invoiceType: 'purchase' });
+  },
+
+  // Get draft invoices
+  getDrafts: async (filters?: Omit<InvoiceFilters, 'status'>): Promise<InvoicesResponse> => {
+    return invoicesApi.getAll({ ...filters, status: 'draft' });
+  },
+
+  // Get overdue invoices
+  getOverdue: async (filters?: Omit<InvoiceFilters, 'status'>): Promise<InvoicesResponse> => {
+    return invoicesApi.getAll({ ...filters, status: 'overdue' });
+  },
+};
diff --git a/src/features/invoices/index.ts b/src/features/invoices/index.ts
new file mode 100644
index 0000000..e0ce1a6
--- /dev/null
+++ b/src/features/invoices/index.ts
@@ -0,0 +1,2 @@
+export * from './api/invoices.api';
+export * from './types';
diff --git a/src/features/invoices/types/index.ts b/src/features/invoices/types/index.ts
new file mode 100644
index 0000000..77401dd
--- /dev/null
+++ b/src/features/invoices/types/index.ts
@@ -0,0 +1 @@
+export * from './invoice.types';
diff --git a/src/features/invoices/types/invoice.types.ts b/src/features/invoices/types/invoice.types.ts
new file mode 100644
index 0000000..d626a0f
--- /dev/null
+++ b/src/features/invoices/types/invoice.types.ts
@@ -0,0 +1,189 @@
+export type InvoiceType = 'sale' | 'purchase' | 'credit_note' | 'debit_note';
+export type InvoiceStatus = 'draft' | 'validated' | 'sent' | 'partial' | 'paid' | 'overdue' | 'void' | 'refunded' | 'cancelled' | 'voided';
+export type InvoiceContext = 'commercial' | 'saas';
+
+export interface Invoice {
+  id: string;
+  tenantId: string;
+  invoiceNumber: string;
+  invoiceType: InvoiceType;
+  invoiceContext: InvoiceContext;
+
+  // Commercial fields
+  salesOrderId?: string | null;
+  purchaseOrderId?: string | null;
+  partnerId?: string | null;
+  partnerName?: string | null;
+  partnerTaxId?: string | null;
+
+  // SaaS fields
+  subscriptionId?: string | null;
+  periodStart?: string | null;
+  periodEnd?: string | null;
+
+  // Billing info
+  billingName?: string | null;
+  billingEmail?: string | null;
+  billingAddress?: Record<string, any> | null;
+  taxId?: string | null;
+
+  // Dates
+  invoiceDate: string;
+  dueDate?: string | null;
+  paymentDate?: string | null;
+  paidAt?: string | null;
+
+  // Amounts
+  currency: string;
+  exchangeRate: number;
+  subtotal: number;
+  taxAmount: number;
+  withholdingTax: number;
+  discountAmount: number;
+  total: number;
+  amountPaid: number;
+  amountDue?: number | null;
+  paidAmount: number;
+
+  // Payment
+  paymentTermDays: number;
+  paymentMethod?: string | null;
+  paymentReference?: string | null;
+
+  // Status
+  status: InvoiceStatus;
+
+  // CFDI
+  cfdiUuid?: string | null;
+  cfdiStatus?: string | null;
+  cfdiXml?: string | null;
+  cfdiPdfUrl?: string | null;
+
+  // Notes
+  notes?: string | null;
+  internalNotes?: string | null;
+
+  // Audit
+  createdAt: string;
+  createdBy?: string | null;
+  updatedAt: string;
+  updatedBy?: string | null;
+  deletedAt?: string | null;
+
+  // Relations
+  items?: InvoiceItem[];
+}
+
+export interface InvoiceItem {
+  id: string;
+  invoiceId: string;
+  description: string;
+  itemType: string;
+  quantity: number;
+  unitPrice: number;
+  subtotal: number;
+  profileCode?: string | null;
+  platform?: string | null;
+  periodStart?: string | null;
+  periodEnd?: string | null;
+  metadata?: Record<string, any>;
+  createdAt: string;
+}
+
+export interface CreateInvoiceDto {
+  invoiceType?: InvoiceType;
+  invoiceContext?: InvoiceContext;
+
+  // Commercial
+  partnerId?: string;
+  partnerName?: string;
+  partnerTaxId?: string;
+  salesOrderId?: string;
+  purchaseOrderId?: string;
+
+  // SaaS
+  subscriptionId?: string;
+  periodStart?: string;
+  periodEnd?: string;
+
+  // Billing
+  billingName?: string;
+  billingEmail?: string;
+  billingAddress?: Record<string, any>;
+  taxId?: string;
+
+  // Dates
+  invoiceDate?: string;
+  dueDate?: string;
+
+  // Amounts
+  currency?: string;
+  exchangeRate?: number;
+  paymentTermDays?: number;
+
+  // Notes
+  notes?: string;
+  internalNotes?: string;
+
+  // Items
+  items?: CreateInvoiceItemDto[];
+}
+
+export interface CreateInvoiceItemDto {
+  description: string;
+  itemType?: string;
+  quantity: number;
+  unitPrice: number;
+  metadata?: Record<string, any>;
+}
+
+export interface UpdateInvoiceDto {
+  partnerId?: string;
+  partnerName?: string;
+  partnerTaxId?: string;
+  billingName?: string;
+  billingEmail?: string;
+  billingAddress?: Record<string, any>;
+  taxId?: string;
+  invoiceDate?: string;
+  dueDate?: string | null;
+  currency?: string;
+  exchangeRate?: number;
+  paymentTermDays?: number;
+  paymentMethod?: string;
+  paymentReference?: string;
+  notes?: string | null;
+  internalNotes?: string | null;
+}
+
+export interface InvoiceFilters {
+  search?: string;
+  invoiceType?: InvoiceType;
+  invoiceContext?: InvoiceContext;
+  status?: InvoiceStatus;
+  partnerId?: string;
+  dateFrom?: string;
+  dateTo?: string;
+  page?: number;
+  limit?: number;
+  sortBy?: string;
+  sortOrder?: 'asc' | 'desc';
+}
+
+export interface InvoicesResponse {
+  data: Invoice[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}
+
+export interface InvoiceStats {
+  total: number;
+  byStatus: Record<InvoiceStatus, number>;
+  totalRevenue: number;
+  pendingAmount: number;
+  overdueAmount: number;
+}
diff --git a/src/features/purchases/api/purchases.api.ts b/src/features/purchases/api/purchases.api.ts
new file mode 100644
index 0000000..64054d2
--- /dev/null
+++ b/src/features/purchases/api/purchases.api.ts
@@ -0,0 +1,157 @@
+import { api } from '@services/api/axios-instance';
+import type {
+  PurchaseOrder,
+  CreatePurchaseOrderDto,
+  UpdatePurchaseOrderDto,
+  PurchaseOrderFilters,
+  PurchaseOrdersResponse,
+  PurchaseReceipt,
+  CreatePurchaseReceiptDto,
+  PurchaseReceiptFilters,
+  PurchaseReceiptsResponse,
+} from '../types';
+
+const ORDERS_URL = '/api/v1/purchases/orders';
+const RECEIPTS_URL = '/api/v1/purchases/receipts';
+
+export const purchasesApi = {
+  // ==================== Purchase Orders ====================
+
+  // Get all purchase orders with filters
+  getOrders: async (filters?: PurchaseOrderFilters): Promise<PurchaseOrdersResponse> => {
+    const params = new URLSearchParams();
+    if (filters?.companyId) params.append('companyId', filters.companyId);
+    if (filters?.partnerId) params.append('partnerId', filters.partnerId);
+    if (filters?.status) params.append('status', filters.status);
+    if (filters?.dateFrom) params.append('dateFrom', filters.dateFrom);
+    if (filters?.dateTo) params.append('dateTo', filters.dateTo);
+    if (filters?.search) params.append('search', filters.search);
+    if (filters?.page) params.append('page', String(filters.page));
+    if (filters?.limit) params.append('limit', String(filters.limit));
+    if (filters?.sortBy) params.append('sortBy', filters.sortBy);
+    if (filters?.sortOrder) params.append('sortOrder', filters.sortOrder);
+
+    const response = await api.get<PurchaseOrdersResponse>(`${ORDERS_URL}?${params.toString()}`);
+    return response.data;
+  },
+
+  // Get purchase order by ID
+  getOrderById: async (id: string): Promise<PurchaseOrder> => {
+    const response = await api.get<PurchaseOrder>(`${ORDERS_URL}/${id}`);
+    return response.data;
+  },
+
+  // Create purchase order
+  createOrder: async (data: CreatePurchaseOrderDto): Promise<PurchaseOrder> => {
+    const response = await api.post<PurchaseOrder>(ORDERS_URL, data);
+    return response.data;
+  },
+
+  // Update purchase order
+  updateOrder: async (id: string, data: UpdatePurchaseOrderDto): Promise<PurchaseOrder> => {
+    const response = await api.patch<PurchaseOrder>(`${ORDERS_URL}/${id}`, data);
+    return response.data;
+  },
+
+  // Delete purchase order
+  deleteOrder: async (id: string): Promise<void> => {
+    await api.delete(`${ORDERS_URL}/${id}`);
+  },
+
+  // ==================== Order Actions ====================
+
+  // Confirm purchase order
+  confirmOrder: async (id: string): Promise<PurchaseOrder> => {
+    const response = await api.post<PurchaseOrder>(`${ORDERS_URL}/${id}/confirm`);
+    return response.data;
+  },
+
+  // Cancel purchase order
+  cancelOrder: async (id: string): Promise<PurchaseOrder> => {
+    const response = await api.post<PurchaseOrder>(`${ORDERS_URL}/${id}/cancel`);
+    return response.data;
+  },
+
+  // Get draft orders
+  getDrafts: async (filters?: Omit<PurchaseOrderFilters, 'status'>): Promise<PurchaseOrdersResponse> => {
+    return purchasesApi.getOrders({ ...filters, status: 'draft' });
+  },
+
+  // Get confirmed orders
+  getConfirmed: async (filters?: Omit<PurchaseOrderFilters, 'status'>): Promise<PurchaseOrdersResponse> => {
+    return purchasesApi.getOrders({ ...filters, status: 'confirmed' });
+  },
+
+  // Get orders by supplier
+  getBySupplier: async (partnerId: string, filters?: Omit<PurchaseOrderFilters, 'partnerId'>): Promise<PurchaseOrdersResponse> => {
+    return purchasesApi.getOrders({ ...filters, partnerId });
+  },
+
+  // ==================== Purchase Receipts ====================
+
+  // Get all receipts
+  getReceipts: async (filters?: PurchaseReceiptFilters): Promise<PurchaseReceiptsResponse> => {
+    const params = new URLSearchParams();
+    if (filters?.purchaseOrderId) params.append('purchaseOrderId', filters.purchaseOrderId);
+    if (filters?.partnerId) params.append('partnerId', filters.partnerId);
+    if (filters?.status) params.append('status', filters.status);
+    if (filters?.dateFrom) params.append('dateFrom', filters.dateFrom);
+    if (filters?.dateTo) params.append('dateTo', filters.dateTo);
+    if (filters?.search) params.append('search', filters.search);
+    if (filters?.page) params.append('page', String(filters.page));
+    if (filters?.limit) params.append('limit', String(filters.limit));
+
+    const response = await api.get<PurchaseReceiptsResponse>(`${RECEIPTS_URL}?${params.toString()}`);
+    return response.data;
+  },
+
+  // Get receipt by ID
+  getReceiptById: async (id: string): Promise<PurchaseReceipt> => {
+    const response = await api.get<PurchaseReceipt>(`${RECEIPTS_URL}/${id}`);
+    return response.data;
+  },
+
+  // Create receipt (receive goods)
+  createReceipt: async (data: CreatePurchaseReceiptDto): Promise<PurchaseReceipt> => {
+    const response = await api.post<PurchaseReceipt>(RECEIPTS_URL, data);
+    return response.data;
+  },
+
+  // Confirm receipt
+  confirmReceipt: async (id: string): Promise<PurchaseReceipt> => {
+    const response = await api.post<PurchaseReceipt>(`${RECEIPTS_URL}/${id}/confirm`);
+    return response.data;
+  },
+
+  // Cancel receipt
+  cancelReceipt: async (id: string): Promise<PurchaseReceipt> => {
+    const response = await api.post<PurchaseReceipt>(`${RECEIPTS_URL}/${id}/cancel`);
+    return response.data;
+  },
+
+  // Get receipts by order
+  getReceiptsByOrder: async (purchaseOrderId: string): Promise<PurchaseReceiptsResponse> => {
+    return purchasesApi.getReceipts({ purchaseOrderId });
+  },
+
+  // Generate purchase order PDF
+  generateOrderPdf: async (id: string): Promise<Blob> => {
+    const response = await api.get(`${ORDERS_URL}/${id}/pdf`, {
+      responseType: 'blob',
+    });
+    return response.data;
+  },
+
+  // Download purchase order PDF
+  downloadOrderPdf: async (id: string, fileName?: string): Promise<void> => {
+    const blob = await purchasesApi.generateOrderPdf(id);
+    const url = window.URL.createObjectURL(blob);
+    const link = document.createElement('a');
+    link.href = url;
+    link.download = fileName || `purchase-order-${id}.pdf`;
+    document.body.appendChild(link);
+    link.click();
+    document.body.removeChild(link);
+    window.URL.revokeObjectURL(url);
+  },
+};
diff --git a/src/features/purchases/index.ts b/src/features/purchases/index.ts
new file mode 100644
index 0000000..a4b7077
--- /dev/null
+++ b/src/features/purchases/index.ts
@@ -0,0 +1,2 @@
+export * from './api/purchases.api';
+export * from './types';
diff --git a/src/features/purchases/types/index.ts b/src/features/purchases/types/index.ts
new file mode 100644
index 0000000..f8fbad1
--- /dev/null
+++ b/src/features/purchases/types/index.ts
@@ -0,0 +1 @@
+export * from './purchase.types';
diff --git a/src/features/purchases/types/purchase.types.ts b/src/features/purchases/types/purchase.types.ts
new file mode 100644
index 0000000..4c8774a
--- /dev/null
+++ b/src/features/purchases/types/purchase.types.ts
@@ -0,0 +1,174 @@
+export type PurchaseOrderStatus = 'draft' | 'sent' | 'confirmed' | 'done' | 'cancelled';
+
+export interface PurchaseOrderLine {
+  id: string;
+  orderId: string;
+  productId: string;
+  productName?: string;
+  productCode?: string;
+  description: string;
+  quantity: number;
+  qtyReceived: number;
+  qtyInvoiced: number;
+  uomId: string;
+  uomName?: string;
+  priceUnit: number;
+  discount: number;
+  amountUntaxed: number;
+  amountTax: number;
+  amountTotal: number;
+  expectedDate?: string | null;
+}
+
+export interface PurchaseOrder {
+  id: string;
+  tenantId: string;
+  companyId: string;
+  companyName?: string;
+  name: string;
+  ref?: string | null;
+  partnerId: string;
+  partnerName?: string;
+  orderDate: string;
+  expectedDate?: string | null;
+  effectiveDate?: string | null;
+  currencyId: string;
+  currencyCode?: string;
+  paymentTermId?: string | null;
+  amountUntaxed: number;
+  amountTax: number;
+  amountTotal: number;
+  status: PurchaseOrderStatus;
+  receiptStatus?: string | null;
+  invoiceStatus?: string | null;
+  notes?: string | null;
+  lines?: PurchaseOrderLine[];
+  createdAt: string;
+  confirmedAt?: string | null;
+}
+
+export interface CreatePurchaseOrderLineDto {
+  productId: string;
+  description: string;
+  quantity: number;
+  uomId: string;
+  priceUnit: number;
+  discount?: number;
+  expectedDate?: string;
+}
+
+export interface CreatePurchaseOrderDto {
+  companyId: string;
+  name: string;
+  ref?: string;
+  partnerId: string;
+  orderDate: string;
+  expectedDate?: string;
+  currencyId: string;
+  paymentTermId?: string;
+  notes?: string;
+  lines: CreatePurchaseOrderLineDto[];
+}
+
+export interface UpdatePurchaseOrderDto {
+  ref?: string | null;
+  partnerId?: string;
+  orderDate?: string;
+  expectedDate?: string | null;
+  currencyId?: string;
+  paymentTermId?: string | null;
+  notes?: string | null;
+  lines?: CreatePurchaseOrderLineDto[];
+}
+
+export interface PurchaseOrderFilters {
+  companyId?: string;
+  partnerId?: string;
+  status?: PurchaseOrderStatus;
+  dateFrom?: string;
+  dateTo?: string;
+  search?: string;
+  page?: number;
+  limit?: number;
+  sortBy?: string;
+  sortOrder?: 'asc' | 'desc';
+}
+
+export interface PurchaseOrdersResponse {
+  data: PurchaseOrder[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}
+
+// Purchase Receipt types
+export interface PurchaseReceiptLine {
+  id: string;
+  receiptId: string;
+  orderLineId?: string | null;
+  productId: string;
+  productName?: string;
+  description: string;
+  quantityOrdered: number;
+  quantityReceived: number;
+  uomId: string;
+  uomName?: string;
+  warehouseId: string;
+  locationId?: string | null;
+  lotNumber?: string | null;
+  serialNumber?: string | null;
+}
+
+export interface PurchaseReceipt {
+  id: string;
+  tenantId: string;
+  companyId: string;
+  receiptNumber: string;
+  purchaseOrderId: string;
+  purchaseOrderName?: string;
+  partnerId: string;
+  partnerName?: string;
+  receiptDate: string;
+  status: 'draft' | 'done' | 'cancelled';
+  notes?: string | null;
+  lines?: PurchaseReceiptLine[];
+  createdAt: string;
+}
+
+export interface CreatePurchaseReceiptDto {
+  purchaseOrderId: string;
+  receiptDate?: string;
+  warehouseId: string;
+  notes?: string;
+  lines: {
+    orderLineId: string;
+    quantityReceived: number;
+    locationId?: string;
+    lotNumber?: string;
+    serialNumber?: string;
+  }[];
+}
+
+export interface PurchaseReceiptFilters {
+  purchaseOrderId?: string;
+  partnerId?: string;
+  status?: string;
+  dateFrom?: string;
+  dateTo?: string;
+  search?: string;
+  page?: number;
+  limit?: number;
+}
+
+export interface PurchaseReceiptsResponse {
+  data: PurchaseReceipt[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}
diff --git a/src/features/sales/api/sales.api.ts b/src/features/sales/api/sales.api.ts
new file mode 100644
index 0000000..f5173b5
--- /dev/null
+++ b/src/features/sales/api/sales.api.ts
@@ -0,0 +1,194 @@
+import { api } from '@services/api/axios-instance';
+import type {
+  SalesOrder,
+  SalesOrderLine,
+  CreateSalesOrderDto,
+  UpdateSalesOrderDto,
+  CreateSalesOrderLineDto,
+  UpdateSalesOrderLineDto,
+  SalesOrderFilters,
+  SalesOrdersResponse,
+  Quotation,
+  CreateQuotationDto,
+  QuotationFilters,
+  QuotationsResponse,
+} from '../types';
+
+const ORDERS_URL = '/api/v1/sales/orders';
+const QUOTATIONS_URL = '/api/v1/sales/quotations';
+
+export const salesApi = {
+  // ==================== Sales Orders ====================
+
+  // Get all sales orders with filters
+  getOrders: async (filters?: SalesOrderFilters): Promise<SalesOrdersResponse> => {
+    const params = new URLSearchParams();
+    if (filters?.companyId) params.append('companyId', filters.companyId);
+    if (filters?.partnerId) params.append('partnerId', filters.partnerId);
+    if (filters?.status) params.append('status', filters.status);
+    if (filters?.invoiceStatus) params.append('invoiceStatus', filters.invoiceStatus);
+    if (filters?.deliveryStatus) params.append('deliveryStatus', filters.deliveryStatus);
+    if (filters?.dateFrom) params.append('dateFrom', filters.dateFrom);
+    if (filters?.dateTo) params.append('dateTo', filters.dateTo);
+    if (filters?.search) params.append('search', filters.search);
+    if (filters?.page) params.append('page', String(filters.page));
+    if (filters?.limit) params.append('limit', String(filters.limit));
+    if (filters?.sortBy) params.append('sortBy', filters.sortBy);
+    if (filters?.sortOrder) params.append('sortOrder', filters.sortOrder);
+
+    const response = await api.get<SalesOrdersResponse>(`${ORDERS_URL}?${params.toString()}`);
+    return response.data;
+  },
+
+  // Get sales order by ID
+  getOrderById: async (id: string): Promise<SalesOrder> => {
+    const response = await api.get<SalesOrder>(`${ORDERS_URL}/${id}`);
+    return response.data;
+  },
+
+  // Create sales order
+  createOrder: async (data: CreateSalesOrderDto): Promise<SalesOrder> => {
+    const response = await api.post<SalesOrder>(ORDERS_URL, data);
+    return response.data;
+  },
+
+  // Update sales order
+  updateOrder: async (id: string, data: UpdateSalesOrderDto): Promise<SalesOrder> => {
+    const response = await api.patch<SalesOrder>(`${ORDERS_URL}/${id}`, data);
+    return response.data;
+  },
+
+  // Delete sales order
+  deleteOrder: async (id: string): Promise<void> => {
+    await api.delete(`${ORDERS_URL}/${id}`);
+  },
+
+  // ==================== Order Lines ====================
+
+  // Add line to order
+  addLine: async (orderId: string, data: CreateSalesOrderLineDto): Promise<SalesOrderLine> => {
+    const response = await api.post<SalesOrderLine>(`${ORDERS_URL}/${orderId}/lines`, data);
+    return response.data;
+  },
+
+  // Update order line
+  updateLine: async (orderId: string, lineId: string, data: UpdateSalesOrderLineDto): Promise<SalesOrderLine> => {
+    const response = await api.patch<SalesOrderLine>(`${ORDERS_URL}/${orderId}/lines/${lineId}`, data);
+    return response.data;
+  },
+
+  // Remove order line
+  removeLine: async (orderId: string, lineId: string): Promise<void> => {
+    await api.delete(`${ORDERS_URL}/${orderId}/lines/${lineId}`);
+  },
+
+  // ==================== Order Actions ====================
+
+  // Confirm order (send to customer)
+  confirmOrder: async (id: string): Promise<SalesOrder> => {
+    const response = await api.post<SalesOrder>(`${ORDERS_URL}/${id}/confirm`);
+    return response.data;
+  },
+
+  // Cancel order
+  cancelOrder: async (id: string): Promise<SalesOrder> => {
+    const response = await api.post<SalesOrder>(`${ORDERS_URL}/${id}/cancel`);
+    return response.data;
+  },
+
+  // Create invoice from order
+  createInvoice: async (id: string): Promise<{ orderId: string; invoiceId: string }> => {
+    const response = await api.post<{ orderId: string; invoiceId: string }>(`${ORDERS_URL}/${id}/invoice`);
+    return response.data;
+  },
+
+  // Get draft orders
+  getDrafts: async (filters?: Omit<SalesOrderFilters, 'status'>): Promise<SalesOrdersResponse> => {
+    return salesApi.getOrders({ ...filters, status: 'draft' });
+  },
+
+  // Get confirmed orders
+  getConfirmed: async (filters?: Omit<SalesOrderFilters, 'status'>): Promise<SalesOrdersResponse> => {
+    return salesApi.getOrders({ ...filters, status: 'sale' });
+  },
+
+  // Get orders by customer
+  getByCustomer: async (partnerId: string, filters?: Omit<SalesOrderFilters, 'partnerId'>): Promise<SalesOrdersResponse> => {
+    return salesApi.getOrders({ ...filters, partnerId });
+  },
+
+  // ==================== Quotations ====================
+
+  // Get all quotations
+  getQuotations: async (filters?: QuotationFilters): Promise<QuotationsResponse> => {
+    const params = new URLSearchParams();
+    if (filters?.companyId) params.append('companyId', filters.companyId);
+    if (filters?.partnerId) params.append('partnerId', filters.partnerId);
+    if (filters?.status) params.append('status', filters.status);
+    if (filters?.dateFrom) params.append('dateFrom', filters.dateFrom);
+    if (filters?.dateTo) params.append('dateTo', filters.dateTo);
+    if (filters?.search) params.append('search', filters.search);
+    if (filters?.page) params.append('page', String(filters.page));
+    if (filters?.limit) params.append('limit', String(filters.limit));
+
+    const response = await api.get<QuotationsResponse>(`${QUOTATIONS_URL}?${params.toString()}`);
+    return response.data;
+  },
+
+  // Get quotation by ID
+  getQuotationById: async (id: string): Promise<Quotation> => {
+    const response = await api.get<Quotation>(`${QUOTATIONS_URL}/${id}`);
+    return response.data;
+  },
+
+  // Create quotation
+  createQuotation: async (data: CreateQuotationDto): Promise<Quotation> => {
+    const response = await api.post<Quotation>(QUOTATIONS_URL, data);
+    return response.data;
+  },
+
+  // Send quotation
+  sendQuotation: async (id: string): Promise<Quotation> => {
+    const response = await api.post<Quotation>(`${QUOTATIONS_URL}/${id}/send`);
+    return response.data;
+  },
+
+  // Accept quotation
+  acceptQuotation: async (id: string): Promise<Quotation> => {
+    const response = await api.post<Quotation>(`${QUOTATIONS_URL}/${id}/accept`);
+    return response.data;
+  },
+
+  // Reject quotation
+  rejectQuotation: async (id: string, reason?: string): Promise<Quotation> => {
+    const response = await api.post<Quotation>(`${QUOTATIONS_URL}/${id}/reject`, { reason });
+    return response.data;
+  },
+
+  // Convert quotation to sales order
+  convertToOrder: async (id: string): Promise<SalesOrder> => {
+    const response = await api.post<SalesOrder>(`${QUOTATIONS_URL}/${id}/convert`);
+    return response.data;
+  },
+
+  // Generate quotation PDF
+  generateQuotationPdf: async (id: string): Promise<Blob> => {
+    const response = await api.get(`${QUOTATIONS_URL}/${id}/pdf`, {
+      responseType: 'blob',
+    });
+    return response.data;
+  },
+
+  // Download quotation PDF
+  downloadQuotationPdf: async (id: string, fileName?: string): Promise<void> => {
+    const blob = await salesApi.generateQuotationPdf(id);
+    const url = window.URL.createObjectURL(blob);
+    const link = document.createElement('a');
+    link.href = url;
+    link.download = fileName || `quotation-${id}.pdf`;
+    document.body.appendChild(link);
+    link.click();
+    document.body.removeChild(link);
+    window.URL.revokeObjectURL(url);
+  },
+};
diff --git a/src/features/sales/index.ts b/src/features/sales/index.ts
new file mode 100644
index 0000000..197fa01
--- /dev/null
+++ b/src/features/sales/index.ts
@@ -0,0 +1,2 @@
+export * from './api/sales.api';
+export * from './types';
diff --git a/src/features/sales/types/index.ts b/src/features/sales/types/index.ts
new file mode 100644
index 0000000..7b322b6
--- /dev/null
+++ b/src/features/sales/types/index.ts
@@ -0,0 +1 @@
+export * from './sales.types';
diff --git a/src/features/sales/types/sales.types.ts b/src/features/sales/types/sales.types.ts
new file mode 100644
index 0000000..ed555b9
--- /dev/null
+++ b/src/features/sales/types/sales.types.ts
@@ -0,0 +1,207 @@
+export type SalesOrderStatus = 'draft' | 'sent' | 'sale' | 'done' | 'cancelled';
+export type InvoiceStatus = 'pending' | 'partial' | 'invoiced';
+export type DeliveryStatus = 'pending' | 'partial' | 'delivered';
+export type InvoicePolicy = 'order' | 'delivery';
+
+export interface SalesOrderLine {
+  id: string;
+  orderId: string;
+  productId: string;
+  productName?: string;
+  description: string;
+  quantity: number;
+  qtyDelivered: number;
+  qtyInvoiced: number;
+  uomId: string;
+  uomName?: string;
+  priceUnit: number;
+  discount: number;
+  taxIds: string[];
+  amountUntaxed: number;
+  amountTax: number;
+  amountTotal: number;
+  analyticAccountId?: string | null;
+}
+
+export interface SalesOrder {
+  id: string;
+  tenantId: string;
+  companyId: string;
+  companyName?: string;
+  name: string;
+  clientOrderRef?: string | null;
+  partnerId: string;
+  partnerName?: string;
+  orderDate: string;
+  validityDate?: string | null;
+  commitmentDate?: string | null;
+  currencyId: string;
+  currencyCode?: string;
+  pricelistId?: string | null;
+  pricelistName?: string;
+  paymentTermId?: string | null;
+  userId?: string | null;
+  userName?: string;
+  salesTeamId?: string | null;
+  salesTeamName?: string;
+  amountUntaxed: number;
+  amountTax: number;
+  amountTotal: number;
+  status: SalesOrderStatus;
+  invoiceStatus: InvoiceStatus;
+  deliveryStatus: DeliveryStatus;
+  invoicePolicy: InvoicePolicy;
+  pickingId?: string | null;
+  notes?: string | null;
+  termsConditions?: string | null;
+  lines?: SalesOrderLine[];
+  createdAt: string;
+  confirmedAt?: string | null;
+}
+
+export interface CreateSalesOrderDto {
+  companyId: string;
+  partnerId: string;
+  clientOrderRef?: string;
+  orderDate?: string;
+  validityDate?: string;
+  commitmentDate?: string;
+  currencyId: string;
+  pricelistId?: string;
+  paymentTermId?: string;
+  salesTeamId?: string;
+  invoicePolicy?: InvoicePolicy;
+  notes?: string;
+  termsConditions?: string;
+}
+
+export interface UpdateSalesOrderDto {
+  partnerId?: string;
+  clientOrderRef?: string | null;
+  orderDate?: string;
+  validityDate?: string | null;
+  commitmentDate?: string | null;
+  currencyId?: string;
+  pricelistId?: string | null;
+  paymentTermId?: string | null;
+  salesTeamId?: string | null;
+  invoicePolicy?: InvoicePolicy;
+  notes?: string | null;
+  termsConditions?: string | null;
+}
+
+export interface CreateSalesOrderLineDto {
+  productId: string;
+  description: string;
+  quantity: number;
+  uomId: string;
+  priceUnit: number;
+  discount?: number;
+  taxIds?: string[];
+  analyticAccountId?: string;
+}
+
+export interface UpdateSalesOrderLineDto {
+  description?: string;
+  quantity?: number;
+  uomId?: string;
+  priceUnit?: number;
+  discount?: number;
+  taxIds?: string[];
+  analyticAccountId?: string | null;
+}
+
+export interface SalesOrderFilters {
+  companyId?: string;
+  partnerId?: string;
+  status?: SalesOrderStatus;
+  invoiceStatus?: InvoiceStatus;
+  deliveryStatus?: DeliveryStatus;
+  dateFrom?: string;
+  dateTo?: string;
+  search?: string;
+  page?: number;
+  limit?: number;
+  sortBy?: string;
+  sortOrder?: 'asc' | 'desc';
+}
+
+export interface SalesOrdersResponse {
+  data: SalesOrder[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}
+
+// Quotation types
+export interface Quotation {
+  id: string;
+  tenantId: string;
+  companyId: string;
+  companyName?: string;
+  quotationNumber: string;
+  partnerId: string;
+  partnerName?: string;
+  quotationDate: string;
+  validityDate?: string | null;
+  currencyId: string;
+  currencyCode?: string;
+  amountUntaxed: number;
+  amountTax: number;
+  amountTotal: number;
+  status: 'draft' | 'sent' | 'accepted' | 'rejected' | 'expired' | 'converted';
+  notes?: string | null;
+  termsConditions?: string | null;
+  lines?: QuotationLine[];
+  createdAt: string;
+}
+
+export interface QuotationLine {
+  id: string;
+  quotationId: string;
+  productId: string;
+  productName?: string;
+  description: string;
+  quantity: number;
+  uomId: string;
+  uomName?: string;
+  priceUnit: number;
+  discount: number;
+  amountUntaxed: number;
+  amountTax: number;
+  amountTotal: number;
+}
+
+export interface CreateQuotationDto {
+  companyId: string;
+  partnerId: string;
+  quotationDate?: string;
+  validityDate?: string;
+  currencyId: string;
+  notes?: string;
+  termsConditions?: string;
+}
+
+export interface QuotationFilters {
+  companyId?: string;
+  partnerId?: string;
+  status?: string;
+  dateFrom?: string;
+  dateTo?: string;
+  search?: string;
+  page?: number;
+  limit?: number;
+}
+
+export interface QuotationsResponse {
+  data: Quotation[];
+  meta: {
+    total: number;
+    page: number;
+    limit: number;
+    totalPages: number;
+  };
+}