- Poland’s Ministry of Finance announced the transition from KSeF 1.0 to KSeF 2.0
- KSeF 1.0 Test environment closed on September 1, 2025
- Mandatory compliance begins February 1, 2026
- September 30, 2025: KSeF 2.0 Test environment launches for API testing
- October 15, 2025: Pre-production environment opens for integration testing
- November 1, 2025: New Certificates and Permissions module launches
- November 3, 2025: KSeF Taxpayer App available in Test environment
- January 26, 2026: KSeF 1.0 Production environment discontinued
- February 1, 2026: KSeF 2.0 Production environment goes live
- Testing unavailable until September 30, 2025
- Businesses should prepare for testing and integration
- Early engagement with software providers is crucial
- Staff training on new system requirements is necessary
- KSeF 2.0 is essential for Poland’s mandatory e-invoicing mandate by April 1, 2026
Source: vatabout.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.
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