I have a repeat customer that requires me to address the invoice to their customer at the office address
Hello there, shaunhiggs
Some customers prefer a paper copy of their invoice. In QuickBooks Online, you can print the invoice by following these steps:
Go to Sales > Customers.
Select the customer's name and click on the invoice.
At the bottom, click on the Print or Preview.
Once printed out, you can put it in an envelope and mail it to the customer's address. You can also send the invoice via email by clicking the Save and Send button. They might appreciate both versions.