Within Teamwork Projects, you can change the email address associated with your subscription invoices.
The default email address for your invoice and subscription emails will be your site owner's email address when you subscribe to a plan.
To change it to another email address, click your profile icon in the top right of your site and choose Subscription.
In the Subscription area, under your current plan summary, click the Update Payment Details.
This will bring you through the checkout process where you can enter in a new contact email address.
For some subscription plans, the steps to update differ. Click View Invoices near the top right of your Subscription area to view your invoices.
This will bring you to the invoice history tab:
Scroll to the bottom of the list of payments, where you will see a link to Choose another email address.
Note: Only site administrators in the owner company can access this area.
For more information, see: Adding more users to your subscription on per-user plans