When you subscribe to a Teamwork Desk plan, the default email address for the invoice and subscription emails will be your site owner address.
To change this to any other email address - for example, if your accounts team have a general address where they like to manage receipts.
To change this click on your profile icon to the top right of the navigation bar and select 'Settings':
Near the top of the page select the 'Billing' area of settings:
On the billing screen, click the "Billing settings" area on the left hand pane:
To the center of the screen you will see an option to enter the invoice email address. Once entered select change to update:
Note: Only administrators can access this area.
For more information see: How billing works