- Ministry of Finance published KSeF 2.0 handbook in September 2025 explaining mandatory use of National e-Invoice System starting February 1, 2026
- Three types of invoices are distinguished under VAT law including structured invoices, electronic invoices, and paper invoices with different requirements and formats
- Structured invoices called e-Invoices will be issued using KSeF system with FA logical structure, XML file format, and assigned KSeF identification numbers
- Only structured invoices in XML format will be issued through KSeF system starting February 2026, excluding pro forma invoices, internal documents, and unstructured attachments
- The handbook covers five basic steps for issuing invoices through KSeF system along with practical issues like invoice rejection, errors, and visualization processes
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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