Step 2 of 4 · ProjectsAutomations
OpenBooks
Early-stage accounting app with EU VAT logic, invoicing and Peppol export.
What it does
An accounting app for EU businesses: invoices with gap-free numbering, double-entry bookkeeping on a Dutch RGS chart of accounts, EU VAT logic (domestic rates, B2B reverse charge) and PDF and Peppol BIS Billing 3.0 UBL export. It runs on Cloudflare Workers with D1 and R2 storage and needs Node.js 22 or later. Status is early (Phase 1); VAT returns and Dutch filing are deferred; AGPL-3.0.
Where it fits on the map
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Maintain this project?
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[](https://tax-oss.com/projects/openbooks/)