Let me help you guide on how to delete the duplicate deposits in QuickBooks Online (QBO).
Once you receive a payment to QuickBooks, they will both reflect on your Accounts Receivable and bank register. To avoid duplicates from the downloaded data in bank feeds, you'll need to choose the Match option instead of Add.
To delete the duplicate one, you'll have to go to the For Review and Excluded tabs in the Banking menu. Here's how:
In your QuickBooks Online account, click Transactions from the left panel and then select Banking.
Select the appropriate bank account.
In the For Review tab, find and select the deposit you want to delete.
Click the Exclude.
Once done, go to the Excluded tab.
Put a checkmark on the deposit and select Delete.
It's right that you've deleted them and they showed up on the Banking page specifically the For Review tab. So they won't cause duplicates again, you can select them, click on Batch Actions and choose to Exclude Selected. This will transfer them from the For Review tab to the Excluded tab.
It’s nice to work with you. Feel free to click the Reply button below if you need further assistance with duplicate transactions. The Community Team and I are always here to help.