Invoicing & KSeF
Full support for Poland's National e-Invoice System (KSeF) and Polish tax law. Issue invoices in PLN and foreign currencies, export JPK_FA and automatically deliver documents to the Ministry of Finance — from a single panel integrated with CRM, inventory and accounting.
What we solve
Not ready for the mandatory KSeF e-invoicing rollout.
Built-in KSeF integration: FA(2) schema, validation, delivery to the Ministry of Finance and UPO receipt — no separate app.
Manual NIP entry and counterparty data errors.
Automatic GUS / REGON lookup, VAT white-list verification and warnings for inactive NIPs.
Non-compliant JPK_FA and pain during tax inspections.
One-click JPK_FA export, full document history and audit-ready logs for e-inspections.
Related ecosystem modules
Try 4b2b in your Polish business
Free demo, Polish-language support, full KSeF & GDPR alignment. No credit card required.
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