- Polish Ministry of Finance published KSeF 2.0 API documentation and FA3 logical structure on 30 June 2025
- Enables businesses and software providers to prepare for KSeF 2.0 implementation in the test environment
- Technical documentation includes FA3 schema logical structure, API specifications, changes from KSeF API 1.0 to 2.0, and KSeF 2.0 features
- FA3 logical structure is the official Polish e-invoice schema developed with input from experts and users
- KSeF 2.0 becomes mandatory for taxpayers on 1 February 2026, replacing the FA2 schema
- Implementation timeline: 30 June 2025 for documentation release, 30 September 2025 for test environment, November 2025 for test version of Taxpayer Application, 1 February 2026 for mandatory implementation
- Phased implementation starts with larger businesses in February 2026, other taxpayers in April 2026, smallest businesses by January 2027
- Legislative process for KSeF 2.0 continues, with regulations expected by July 2025
Source: sovos.com
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.
