- Structured invoices issued via KSeF cannot be annulled, including after February 1, 2026.
- Current practice allows annulment of unnecessary invoices only if the transaction did not occur and the invoice was not legally circulated.
- The Ministry of Finance confirmed KSeF 2.0 is ready for launch on February 1, 2026, with full technical and user support available.
- Annulment involves marking and invalidating all copies of the invoice to prevent their use.
- KSeF users have access to a 24/7 helpline and technical support for integration and operational issues.
Source: ksiegowosc.infor.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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