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Ksef - National e-Invoice System



Good morning, our company operates in Poland, and starting next year, we will be implementing the National e-Invoice System (KSeF), the Ministry of Finance's central IT system for issuing, receiving, and storing structured invoices. Starting in 2026, using KSeF will be mandatory for all businesses. I'd appreciate any information regarding the integration of Whmcs with KSeF. Best regards.
Piotr Stoczewski

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