Question about VAT and receiving payment

Hey guys,

When I was signing the payment agreement I noticed there was a VAT field. If I understand correctly, the VAT is paid by the customer when checking out. If my listed model price is 29.9$ then the buyer would be charged around 36$?

If I am wrong, then I will be charged VAT, which is an additional 21% on top of around 30% that the site already takes.

I am not sure which one of the top statements is true.

I saw there were some changes regarding how the VAT is calculated a few years back so I wanted to be sure how much I will receive on PAYPAL.

Thanks in advance!