- Starting February 1, 2026, Poland mandates B2B invoicing via the National e-Invoice System (KSeF).
- The Ministry of Finance released new tools, including the Certificates and Authorizations Module (MCU), to manage access and digital certificates for KSeF 2.0.
- A demo version of the KSeF 2.0 API was released in October 2025 for businesses to test integration.
- The MCU allows users to manage permissions, apply for, and download digital certificates, which are required for KSeF 2.0 access.
- New authorizations must be managed through the MCU; the old KSeF 1.0 Taxpayer Application can no longer be used for this purpose.
Source: fiscal-requirements.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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