Hi How do I amended an invoice that has been printed

Hello there, @yomarassociates.

I'd be glad to help you amend your invoice in QuickBooks Online. You can delete the invoice transaction in the Invoicing menu. Here's how to do that:

1. Go to the Invoicing menu and select Invoices.
2. Locate the invoice you want to delete, then select the drop-down button under the Actions column.
3. Select Delete and then confirm it by clicking Yes.

I've also added a screenshot for your reference.

Then, you can run the Profit and Loss report to see the difference before and after deleting the invoice. It should look like this:

I've included this page of articles for your future task about handling your sales in QuickBooks Online: Sales and customers. This contains helpful topics, such as managing refunds and credits.

Please don't hesitate to let me know in the comment section below if you need anything else about QuickBooks. I'd be happy to back you up. Take care and have a wonderful day ahead.