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QuickBooks Integrations Technical Overview

This document describes the current QuickBooks integration architecture in Alga PSA.

Current State (UI)

  • QuickBooks CSV (quickbooks_csv): enabled and selectable in Settings → Integrations → Accounting.
  • QuickBooks Online OAuth (quickbooks_online): shown as Coming soon (disabled in UI).

Shared Accounting Export Architecture

QuickBooks integrations use the shared accounting export pipeline:

  • Accounting Export Service (server/src/lib/services/accountingExportService.ts) orchestrates batch creation, validation, execution, and audit tracking.
  • Validation (server/src/lib/validation/accountingExportValidation.ts) ensures required mappings exist and updates batch status to ready or needs_attention.
  • Audit trail is stored in accounting_export_batches, accounting_export_lines, and accounting_export_errors.

CSV Flow (QuickBooks CSV)

UI + API

  • Settings page: QuickBooks CSV panels live under server/src/components/settings/integrations/CSVIntegrationSettings.tsx.
  • Export API: POST /api/accounting/csv/export via server/src/lib/api/controllers/ApiCSVAccountingController.ts.
  • Tax import APIs: /api/accounting/csv/import/tax/* via the same controller.

Mappings

  • Stored in tenant_external_entity_mappings with integration_type = 'quickbooks_csv'.
  • Mapping tabs are rendered by the generic mapping UI:
    • server/src/components/integrations/csv/CSVMappingManager.tsx
    • server/src/components/integrations/csv/csvMappingModules.ts
  • Canonical Alga entity types used for QuickBooks CSV mappings:
    • client (QuickBooks “Customer”)
    • service (QuickBooks “Item”)
    • tax_code (QuickBooks “TaxCode”)
    • payment_term (QuickBooks “Term”)

Export semantics

  • Immutability: once an invoice is successfully exported, we create an invoice mapping for quickbooks_csv and exclude it from future CSV exports.
  • Retry behavior: when users re-export with the same filter set, the request reuses the existing batch and re-validates after mappings are updated.

OAuth Flow (QuickBooks Online Coming Soon)

The quickbooks_online adapter and supporting services exist in code, but the UI entry point is disabled until OAuth rollout is complete.

When enabled, OAuth will add:

  • Realm-scoped catalog lookups (items/tax codes/terms/customers) to improve mapping UX.
  • API-based delivery via the quickbooks_online adapter (instead of file delivery).