Through MyBusiness
Update in MyBusiness
Log in to MyBusiness.
Click Invoices and select Billing accounts.
Select the billing account whose billing address you want to update.
Click Edit in the Billing account details section.
Select Change account details.
Enter the new address. You can also add a reference or label, such as a cost center, in the C/O address field.
Click Save account details.
Done! Your new billing address has been saved.