To update the billing address on your account:
For a single lab subscription:
Select the lab settings button, located on the right hand side of the lab dashboard page.
For Enterprise subscriptions:
The settings for the subscription are located at the bottom of the left hand menu for the organisation admin. Then follow the same steps as above.
In the lab settings, select the Subscription tab and click View Billing Details
This will open in a new tab the Clustermarket billing portal. Click on the Billing Information option on the menu and input your billing address here.