How does an ERP integrate a tax API?
When your ERP posts a sales invoice, it maps the document to the canonical invoice shape and POSTs it to the tax API with the right authority header. The gateway files it and returns a fiscal number and QR, which the ERP stores against the document for reprints and audit.
ERP-to-authority flow
ERP posts sales invoice
↓
Map to canonical invoice
↓
POST to TaxBridge
↓
Route to authority
↓
Fiscal number + QR
↓
Store on the document
Implementation steps
Map your document
Map ERP fields to the canonical customer, items, tax and totals.
Choose the authority
Set X-Tax-Authority per company/branch (or per document for goods vs services).
Handle the response
Persist submissionId, authorityInvoiceNumber and qrCode on the document.
Reconcile monthly
Use logs and quota for month-end reconciliation.
Multi-company ERPs
Group and multi-tenant ERPs can manage many companies and branches under one TaxBridge account, each with isolated credentials and quota. See multi-branch integration and the ERP integration page.
Frequently asked questions
Which ERPs can integrate?
Any ERP or accounting system that produces a sales invoice and can make an HTTP request — including custom enterprise apps.
Where do I store the fiscal result?
On the sales document, so reprints and audits show the authority invoice number and QR.
Can one ERP file to several authorities?
Yes — set the authority per document, so goods go to FBR and services to the province.