E-invoicing in Poland — KSeF 2.0 mandate, FA(3) format and penalties
Poland's KSeF (Krajowy System e-Faktur) explained: structured invoices in the FA(3) XML format through KSeF 2.0 — mandatory for issuers with 2024 gross sales above PLN 200 million and for all receivers from 1 February 2026, for other taxpayers from 1 April 2026, and for all in-scope taxpayers from 1 January 2027. Scope and exclusions, B2G via PEF, offline24 and outage modes, KSeF certificates and tokens, corrections, and penalties under art. 106ni (from 1 January 2027 under current law; a pending bill would defer them to 1 January 2028).