As Coda is a US based company, we do not process VAT details on our end. However, if you have an EU VAT number and would like these details included on your invoices, we can help with that!
Just send an email to email@example.com with the following info:
Billing email address
Workspace name, which you can find here:
One thing to note: Once your EU VAT number is added to your billing account, it will show on all future invoices. However, it will not retroactively show on past invoices.