Hi there, @contact34.
You'll need to delete the first invoice that is linked to the quote that you've updated and create a new one. Let me show you how.
In your QuickBooks Online (QBO) account:
- Open the Invoice.
- Hover to the 1 linked transactions link and click Remove.
- Once done, click More at the bottom of the invoice and click Delete.
- Then, open the quote you've updated and click Create invoice.
I'm also adding this helpful article that can help guide you to learn how to customise invoice in QBO: Customise your Invoices, Quotes and Sales Receipts in QuickBooks Online.
As always, if you need further assistant, don't hesitate to leave a comment below. I'm always here to help.