- The Ministry of Finance launched the test environment for the KSeF 2.0 API on September 30, 2025.
- Integration with the KSeF 2.0 API is necessary for financial systems to comply with the mandatory version.
- Technical support is available for users of the test environment.
- The KSeF 2.0 Manual provides detailed guidance on using the system.
- Further implementation stages are planned, including a pre-production environment release on October 15.
Source: gov.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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