- Test environment KSeF 1.0 will be disabled on September 1
- New test environment KSeF 2.0 will replace KSeF 1.0 on September 30
- Current KSeF 1.0 users can use it until January 26, 2026
- Open API tests for KSeF 2.0 start on September 30
- API documentation for KSeF 2.0 was published on June 30
- Module for Certificates and Permissions (MCU) starts on November 1
- Users can test Taxpayer Application KSeF 2.0 from November 3
- Ministry of Finance will provide training sessions from September to mid-December
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.
Latest Posts in "Poland"
- Poland Mandates National E-Invoicing System for All Taxpayers, Phased Implementation by 2027
- How to Correct Errors Without Correction Notes in the New KSeF System?
- Implementation of KSeF: Time to Revise Contracts and Streamline Business Operations
- Mandatory Six-Form VAT Invoices in 2026: Risk of Multiple Originals and Confusion
- What is a Structured Invoice? Is Its Paper Version Valid Under VAT Law?
