- The Ministry of Finance in Poland defines an e-invoice (structured invoice) as an invoice issued using the National e-Invoice System (KSeF) with a unique identifying number in the system.
- The current version of the structured invoice is FA(2), which replaced the previous version FA(1) from September 2023.
- From July 1, 2024, it will be mandatory to issue invoices using KSeF.
- The Ministry of Finance provides commercial accounting software and free tools for issuing structured invoices.
- The Ministry of Finance plans to release a mobile application for convenient and fast issuance and management of structured invoices.
- The structure of the FA(2) version of the structured invoice includes mandatory, optional, and facultative fields.
- The maximum number of characters allowed for alphanumeric fields is generally 256, with some exceptions.
- Polish diacritical marks must be entered using UTF-8 encoding.
- Numeric fields should be entered as a sequence of digits, with decimal places indicated by a dot.
- Dates should be in the format YYYY-MM-DD, and time should be in the format HH:MM:SS.
- Polish tax identification numbers (NIP) should be entered in the NIP field, not in the NrVatUE or NrID fields.
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.
