Hi there, @djboch7.
Glad to have you here in the Community today. I'm here to help share some information about recording sales receipts under the Undeposited Funds in QuickBooks Online.
To ensure we're on the same page, may I know why you are going to delete the sales receipts? If the amount has been deposited already in the Undeposited Funds, you'll have the option to delete it by clicking on the More option at the bottom of the transaction and select on delete.
However, if you wish to record the sales receipt under the Undeposited Funds, you may follow these steps:
Also, here are some great articles that you can check out about deleting sales transactions and how Undeposited Funds works in QuickBooks online for your reference:
This should get you on track.
Don't hesitate to let me know if you have any other questions about this concern or anything about QuickBooks. I'd be pleased to help you out. Thanks for dropping by and have a great weekend!