The billing address and tax number to be included into invoices are initially filled out when you create your subscription. If you need to update them later on, it can be done by account admins on the Billing page.

Just head to the Billing info section at the bottom of the page, and unfold it to see you current details and update them:

Once you have entered the new details, please do not forget to hit Save billing info.

Please note that the updated details will show up on the next invoice, the invoices that have already been finalised will display previously stated details.