Where is the invoice number on the receipt?
The receipt can be treated as a VAT invoice under certain conditions. This is what we call a simplified invoice. Find out where the invoice number is on the receipt!
Types of pits – how many different PIT forms do we have?
Although when we talk about the annual tax return we usually mean the PIT-37 or PIT-36 form, there are many other types of forms. Check when to use them!
Proforma invoice vs. VAT invoice
A proforma, unlike a VAT invoice, is not a basis for taxation. What else makes them different?
Named invoice – what is it, when can it be issued and how to do it?
A named invoice is useful for entrepreneurs whose customers are individuals. Check out how to issue a named invoice!
Internal invoice – what is it and when can it be issued?
The internal invoice was in effect until 2013. It was replaced by an internal taxation document. Find out how they differ!
Income vs. revenue – learn the definitions and differences
Income and revenue are concepts that everyone should be familiar with, regardless of whether they run their own business. Learn more about them!