Tax.

Most Amazon sellers vat in the European market choose to register in the UK, and the vat declaration fee in the UK is the lowest. Secondly, according to the EU's long-distance sales law, you don't need to register for VAT tax in your local country under a certain annual sales quota, for example, France, Germany100,000 Euros, Spain and Italy are 35,000 Euros, so for most sellers, you only need to register for VAT in one country.