How does VAT work with the payments?

There are two options.

When creating a subscription there’s an “Add VAT” button in the checkout.

Or if you have already paid the full amount including VAT, check your email confirmation, then open the "View Receipt" link within it. In this webpage, click the "enter VAT number" link. Enter your VAT ID and your country code in the provided fields. You will then receive a refund confirmation email.