If the GC system does not accept your EU VAT one of the following cases is true
- The entered VAT is not a valid EU VAT registered with VIES (VAT Information Exchange System)
- The entered VAT does not match the selected billing country
- The entered VAT does not match the selected legal form
- The entered VAT is not a VAT but a tax number. In this case please add it to the correct input field "Tax number"