I get the following error: This transaction has been deposited. If you want to change or delete it, you must edit the deposit it appears on and remove it first.

Transactions in deposits are considered "closed" (usually deposits made from Undeposited Funds but not always) The error would indicate that you are attempting to change a total of a payment already on a deposit.  To get past this you must open the deposit, and in some manner remove the payment for editing, change it and then add it back.  If the source was Undeposited Funds you can, in the deposit window, delete the payment or the entire deposit and all payments will revert back to UF. Then you can edit and re-deposit.

When you remove the payment you must "save" the deposit before you can edit.  Consequently, if the deposit has been reconciled the trick is to add a dummy payment in the deposit screen before removing the payment to be edited. Then once done editing, add the correct payment back in, and delete the dummy placeholder payment.

Let me provide insights about the error message, @treasurer75.

You'll encounter this error message when you edit a transaction that is associated with Undeposited Funds.

You have to delete the Bank Deposit first before you can make changes to the payment or sales receipt.

Here's how: 

1. Click Accounting in the left navigation bar.
2. Select Chart of Accounts.
3. Look for the account and click View Register.
4. Find the Deposit and right-click Delete.
5. If you want to delete a specific payment, select it from the list.
6. Now click the Edit tab at the top menu bar.
7. Select Delete Line.
8. Select Yes to confirm your changes.

Please note the delete line option will only show if there are multiple payments on a deposit transaction.

For further details about deposits, you can also check this article: Record and make Bank Deposits in QuickBooks Online.

Also, I'm adding our QuickBooks Online-Video Tutorials on how to create sales receipts and process payments with QuickBooks.

 Feel me in if you have any other questions. Have a good one. 

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