- The finance minister has published key regulations on using the National e-Invoice System (KSeF), just before Christmas.
- Most new regulations, including how to mark and send invoices (even offline), will take effect on February 1, 2026, when KSeF becomes mandatory for the largest taxpayers.
- Some provisions, such as rules for submitting invoices with attachments and technical requirements, will apply from January 1, 2026.
- This is the fourth essential regulation for KSeF implementation; three previous ones cover changes to VAT records, exceptions to structured invoicing, and simplified invoice rules.
Source: podatki.gazetaprawna.pl
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.
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