If you are a VAT registered business, it’s important to record details of the customers VAT number if they have one and if they are based in another EC country or outside the EC entirely. To record these details, if you’re not already there you’ll need to first go to Customers > Select Customer > Options. To record the customers VAT number, simply enter it in the text box labelled VAT Number with no spaces. When you’re done, press the Update button at the bottom. You can check if the VAT number is valid by using the European Commissions VIES VAT number validation tool. To record if the customer is based in another EC state or outside the VAT entirely, then simply tick the appropriate checkbox next to the VAT Options label. You can see which countries are in the EC by using the HMRC assistance table.