

The VAT-number field at checkout.
Keystep EU VAT Suite makes your WooCommerce store charge the correct EU VAT on every order, automatically.
This plugin is a calculation and compliance tool. You remain responsible for your own VAT registration and filings.
OSS return reporting, the EUR 10,000 distance-selling threshold tracker, and audit CSV export are available in a separate Keystep EU VAT Suite Pro add-on, distributed from https://shasan7774.github.io/eu-vat-suite/ and not hosted on WordPress.org. The free plugin above is fully functional on its own.
To apply B2B reverse-charge correctly, this plugin validates EU business VAT numbers against VIES (the VAT Information Exchange System), an official service operated by the European Commission.
The plugin contacts no other third-party services.