- Poland has launched the next stage of testing for its National e-Invoice System (KSeF), including a new KSeF 2.0 API test environment.
- Integration with the KSeF 2.0 API pre-production environment is now available for financial and accounting system providers.
- Mandatory electronic invoicing through KSeF will start February 1, 2026, for large businesses (sales over PLN200m in 2025), and April 1, 2026, for all other taxpayers.
- Small transaction taxpayers and flat-rate farmers have later deadlines, with requirements starting January 1, 2027, and April 1, 2026, respectively.
- A test version of the KSeF 2.0 Taxpayer Application will be available from November 2025 to help entrepreneurs prepare for the new system.
Source: answerconnect.cch.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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