How Do I Fix an 'Invalid VAT Number' Error?

If you are trying to add a VAT number to a customer's Account Information and are receiving an "invalid number" error, you can follow these steps:

1. Validate the VAT number externally: Double-check that the VAT number is valid by using the VIES validation service here: https://ec.europa.eu/taxation_customs/vies/.

2. Check for a country mismatch: Make sure that the country you have saved for the customer's account matches the "Member State" (country) registered for the VAT number. If the countries do not match, you will get an error.