Generate and validate KSeF FA(3) e-invoices — Poland's mandatory structured invoice format (effective from 2026-02-01 for large companies, 2026-04-01 for all). Use this skill whenever the user asks about: issuing invoices to KSeF, FA(3) XML structure, mapping invoice data to the FA(3) schema, e-invoice validation, KSeF validator errors, P_12/P_13/GTU/Adnotacje fields, invoices for foreign buyers (EU, non-EU), foreign currency invoices, reverse charge, WDT, export, VAT exemption, advance invoices, corrective invoices, or any FA(3) logical structure question.

ksefuj6

Dokumente

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