Creates one data mapping configuration; current implementation returns synthetic mapping id. Both /api/v1/integrations/quickbooks/* and /api/v1/quickbooks/* map to the same ApiQuickBooksController method (createDataMapping). This family uses route handlers that instantiate ApiQuickBooksController and usually wrap calls in explicit try/catch handleApiError blocks.
Content type: application/json · schema QuickBooksV1DataMappingBody
customerinvoicepaymentitemtax_codeSuccess response 201 · schema QuickBooksV1ApiSuccess