Within Teamwork Projects you can update your payment details directly through your site if you have a current subscription for example, if your payment card has been replaced or you need to change to a different card.
If you need to change or add a tax number, you can follow this information also.
To the top right of your Teamwork Site select 'settings' and then choose 'Subscription':
Click on the 'Update payment details' button under your subscription plan:
You will then have the option to update your details as below, first enter your country and whether you have a VAT number. You can also choose your industry however this is optonal:
Choose continue and then enter your card details:
Note: only site administrators in the owner company have access to this area.
For more information see: Upgrading your Teamwork Projects plan