By accessing to the WooCommerce -> EU Vat Field - Options you can configure the plugin options. You can, for example, disable the required option or show the Require invoice voice by which the customer can request an invoice. Furthermore, once enabled this option, you can also make the field visible only if the users requests an invoice.
You can also enable the special Validation option. By this option the Vat Number will be validated using the VIES function
The WCEV (WooCommerce EU Vat Field) plugin will also allow you to not charge the VAT taxes for users that have inserted a VAT Number. Optionally taxes can be not charged for all users with a VAT Number or only the ones for which the billing address is different from the store base location (WooCommerce -> Settings -> General -> Base Location).
Field label, placeholder and validation error message can be customized using the Text menu. For WMPL users, text can be localized by just switching the current language using the WPML language selector and then entering texts for the current language.
WCEV seamlessly integrates the EU Vat Field in the Checkout, My Account, Order details pages and in the Order emails. No configuration required, here some screens:
WCEV seamlessly integrates the EU Vat Field also in the backend. The shop admin can retrieve Vat number information and if the user requested an invoice, from the Order details and Orders list pages:
Optionally the admin can edit those info directly in the order details page or using the user profile page: