Hello there, ian-paintspectio.
Welcome to the Online Community. Based on the information provided, it looks like this is a duplicate post.
I already answered the previous one. You can view the detailed information through here: https://quickbooks.intuit.com/learn-support/en-au/manage-customers-and-income/re-how-can-i-create-a-....
For additional reference, I've attached some articles you can use to know more about how to customise the templates in QuickBooks: Customise invoices, quotes, and sales receipts in QuickBooks Online.
Post a comment below if you have additional questions or concerns. I’m here to help you and make sure you’re taken care of. Enjoy the rest of the day.