If you allow $0 initial checkout without a payment method on digital products that have a free trial period, by entering a correct VAT number in the "VAT Number" field in "My Account" the subscription VAT fees changes according to the rules connected to the specifik VAT-number.

As it is today, the "VAT Number" field in "My Account" does not affect the VAT calculation of the product. Also, since a payment method is not presented on the check out, the EU VAT Number field is dissabled.