KSeF and Microsoft Dynamics 365 Business Central – How to Prepare for the Upcoming Changes
The National e-Invoicing System (KSeF) is set to become mandatory for all VAT taxpayers in Poland—both active and exempt. Implementation will be phased depending on the size of the taxpayer:
* February 1, 2026 – for large taxpayers with 2024 sales exceeding PLN 200 million (including VAT)
* April 1, 2026 – for