This article explains what to do if you are VAT-exempt as a gallery located in an EU Member State.
If you are located in the European Union, all fees are exclusive of any VAT and you represent that you are registered for VAT purposes in your member state. At our request, you will provide us with a valid VAT registration number for cross border transactions within the EU under which you are registered in your member state. If you do not provide us with a VAT registration number prior to checkout, we will not issue refunds or credits for any VAT that was charged.
You can check if your VAT number is in the European Commission website here.