Value-added tax (abbreviated VAT) is paid by everyone in the territory of the given state when purchasing most goods and services. That is why it is also called a universal tax. In the Czech Republic, VAT was introduced on January 1, 1993. The principle of VAT is that the supplier, if they are registered as a VAT payer, must deduct part of the value from the transaction if this transaction is subject to tax. On the other hand, the customer can, under certain conditions, request a refund of the VAT paid to the supplier (VAT payer) during the transaction. VAT is one of the most important revenues of the state budget.