Woocommerce extend tax report with custom column

In this case you may consider using the WooCommerce Admin extension. WC-Admin reports are extendable so it is possible to customize them and even create new ones from scratch. You’ll find some code examples and guidelines in the official extensions repo:

https://github.com/woocommerce/woocommerce-admin/tree/master/docs/examples/extensions

Check the add-report to create a new report and the table-column to add new columns to an existing one.