e-Transformation12 min read How to Look Up an E-Invoice Taxpayer: A Step-by-Step Guide by VKN How do you look up an e-invoice taxpayer? Learn the steps with a VKN or TCKN, whether to issue an e-Invoice or an e-Archive depending on the result, and what to do if the wrong document was issued. October 22, 2026Read 
e-Transformation21 min read What Is an Exemption Invoice? Full List of Exemption Codes What is an exemption invoice and how is it issued? Search 145 exemption codes by group (VAT, export-registered, special base, SCT and withholding) and copy a code with one click. March 1, 2024Read