Hello, billy17.
When an estimate is not saved, we're unable to retrieve the information. You will have to re-enter the details on the transaction and make sure to click the Save or Save and close button.
You can check out this article for more information: Customize invoices, estimates, and sales receipts in QuickBooks Online.
I'm just a few clicks away if you have more questions about the sales transactions in QuickBooks Online. Thanks.