The WooCommerce Eu Vat & B2B (WCEV) seamlessly integrates an additional EU Vat Number Field into your WooCommerce platform. It will be dynamically shown during the checkout process only if the selected billing country is part of the European Union. The plugin also offers several other options, like a way to validate the field, make it as mandatory or to remove the Taxes if a valid Vat number has been entered. Optionally you make the registration process available only for business (B2B) with a valid Vat number!
DOCUMENTATION
THE IDEA
WCEV extends WooCommerce adding an EU Vat Number Field that will be dynamically shown during the checkout process and the user profile page (billing address) only if the selected billing country is part of the European Union. The Shop Admin can also make it compulsory and optionally validate it (the plugin uses the VIES function or simply check if it has a valid format ). It also allows you to not charge the users that enter a Vat number.
CONFIGURATION
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.
VAT VALIDATION
The Vat number can be validated using the VIES function. In case the validation fails, the plugin will not allow the checkout to be completed and it will show a validation warning message (customizable using the Texts menu).
Validation can be also performed by just checking if the Vat number has a valid format.
DON’T BOTHER YOUR USERS WITH UNUSEFULL CHECKOUT FIELDS!
Why ask your customers for Company name and Vat if they are just consumers? WCEV allows you to not bother them! 
Using the following options:
- Request an invoice: to display the Vat field only if the user requests an invoice.
- Consumer/Business selector to dynamically display the Company name and Vat fields only if the customer identifies himself as a Business.
TAX EXEMPTION
The WCEV plugin will also allow you to not charge the Vat taxes for users that have inserted a Vat Number. Tax exemption can be applied to all users with a Vat Number (and optionally even for the ones who have the same billing country as the shop base location: WooCommerce -> Settings -> General -> Base Location).
Tax removal will take effect Shop, Product, Cart and Checkout pages. Once a valid Vat Number has been entered on Checkout, My account -> Billing addresses or Registration pages, item prices, and totals will show and billed without taxes.
BUSINESS-TO-BUSINESS (B2B) MADE EASY!
The shop admin can also make the Billing company name field as required! So optionally using this option in conjunction with the VIES Vat validation method and the enabling Tax removal option, shop admin can easily make business to business (b2b) sales.
Demo: https://codecanyon.net/item/woocoomerce-eu-vat-field/19463373
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