I am a freelancer and I support a friend from Greece that has a business in Bulgaria as his technology consultant. He has an ecommerce website, all the payments come from online services but he is issuing retail receipts from a cash register. He wants to be compliant with СУПТО so I suggested that we get a software that is compliant to issue the retail receipts. I imagine this is not necessary for invoices. As we understand СУПТО is a mechanism that sends data to bulgarian government. Can you explain me a little what is СУПТО?
English discussion on СУПТО