Description
ZeroV99 Tax Number is a WooCommerce extension that seamlessly integrates a Tax Identification Number (TIN) field into your store’s checkout process and billing addresses.
Designed for businesses that need to collect valid tax IDs (such as NIF, CIF, VAT, or similar) for invoicing, tax compliance, or B2B transactions.
Features
Tax Number Field Integration
✔ Adds a configurable tax identification field (TIN) to the WooCommerce checkout.
✔ Displays the field in billing addresses (customer account + admin order view).
✔ Compatible with both individuals and businesses (B2B/B2C).
Data Management & Compliance
✔ Stores tax IDs as order meta and user meta for invoicing and compliance.
✔ Includes a full uninstall script (removes all plugin data: meta, options).
Flexibility & Compatibility
✔ Works with block-based and classic checkout templates.
✔ Elementor-compatible – no conflicts with page builders.
✔ Multi-language ready (includes .pot file for translations).
Customization
✔ Custom placeholder text for the TIN field (via plugin settings).
✔ Custom billing order fields (vía pluign settings).
Screenshots
Checkout page with the Tax Number field. 
Admin order screen showing the entered Tax Number. 
Customer “My Account” billing address with Tax Number. 
“My Account” Order details showing the addresses. 
Woocommerce admin settings with the Tax Number tab
Installation
- Download and unzip the plugin from the official WordPress repository or upload it via your WordPress dashboard.
- Go to ‘Plugins’ > ‘Add New’, click ‘Upload Plugin’, and select the ZIP file.
- Activate the plugin.
- Make sure WooCommerce is installed and active.
- Configure placeholder text and field options under WooCommerce > Settings > Tax Number.
FAQ
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Where does the Tax Number field appear?
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The field appears during the WooCommerce checkout process and is included in the billing address for both the customer and admin views.
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Is the Tax Number stored in the order data?
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Yes, the value is saved as order metadata and also stored in the user’s billing profile if applicable.
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Can I customize the placeholder for the field?
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Yes, you can change the default placeholder using the plugin settings.
WooCommerce Settings Tax Number “Tax Number Placeholder” -
What happens when I uninstall the plugin?
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The plugin includes an optional setting to delete all its data upon uninstallation.
You can enable/disable this in:
WooCommerce Settings Tax Number “Delete all plugin data” -
Is the plugin compatible with all WooCommerce themes?
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Yes, it works with most WooCommerce-compatible themes. For best results, use a theme that properly supports WooCommerce hooks.
Reviews
There are no reviews for this plugin.
Contributors & Developers
“ZeroV99 Tax Number” is open source software. The following people have contributed to this plugin.
Contributors
“ZeroV99 Tax Number” has been translated into 1 locale. Thank you to the translators for their contributions.
Translate “ZeroV99 Tax Number” into your language.
Interested in development?
Browse the code, check out the SVN repository, or subscribe to the development log by RSS.
Changelog
+= 1.0.1 =
+* Improvement: Compatibility with WooCommerce 9.9.5
1.0.0
Initial release. Added Tax Number field to checkout and billing. Integrated with order metadata, admin and user views. Full uninstall support.