The VAT Mod currently adds processing to gather as input the customer's VAT Number for B2B transactions, displaying that information on the orders, invoices and packingslips ... and, more importantly, enables that B2B customer to automatically receive a VAT refund.

In its updated version, the plugin will also contact the VIES web-service to validate that the VAT number entered is valid and make modifications to fewer built-in/core Zen Cart modules.