12 Aug 23 Media In this article, legal counsel Rafał Knap explains how the National e-Invoice System works and who will be obliged to use it and when. https://www.pit.pl/aktualnosci/ekspert-wyjasnia-jak-ksef-dziala-w-praktyce-i-na-co-powinni-przygotowac-sie-przedsiebijecji-1008691 Have any questions? Contact us – we'll respond as quickly as possible. Name and surname Email address Phone number Message I consent to the processing of my personal data for the purpose of contacting me back. Post Views: 9 Share