Update customer billing contacts
Go to Customers from the left navigation
Select Customers
Open the customer you want to update
Go to Billing & Contract
Select Billing & Invoice
Click +
4. Add recipients under:
To: Receives invoices
CC: Copied on billing emails
5. Select contacts from the list or add a new external email address
6. Click Add contacts to save
Update customer billing address
In the Billing & Invoice section, scroll to Billing address
Update the required address fields:
Address line 1
Address line 2
Country
State
City
Zip/postal code
Save your changes