Building Blocks - DualEntry Documentation

These guides cover specific integration tasks that come up often enough to document on their own, each independent of the others.

What this section covers

Each guide below is a self-contained task you can integrate independently of the others:

Working with Attachments: attach files to a record and the limits that apply
Bank Connections: Inbound Feed API: push bank transactions into DualEntry from your own systems
How to Calculate Tax Before Creating an Invoice or Bill: calculate tax automatically on write, or apply it manually before you post the record
File and Track E-invoices: set customer identifiers, follow each e-invoice filing, and handle the e-invoicing error codes

Where to go next

For the mechanics that apply across all of these (pagination, errors, idempotent writes), see Core Concepts. For a full custom integration, see How Custom Integrations Work.

Last modified on October 14, 2026