I understand that having this feature in QuickBooks Online is important to you, @cedarcreekrv. I've got some information and an alternative to help you out.

That's right, QuickBooks Desktop offers this feature, which allows you to clear or match two different credit card refunds with only one deposit. It is still possible in QuickBooks Online, but you must exclude the downloaded bank deposit and manually clear the credit and invoice in the bank register. To do so, here's how: 

1. On your left navigation panel, choose Transaction.
2. Select Chart of Accounts. 
3. Locate the account holding the transaction, then click the View register from the Action column. 
4. View the Check column.
5. Keep clicking the checkbox until the letter C shows to mark this transaction as cleared.
6. Click Save and close your account register. 

To learn how to remove individual transactions from your bank statement in QuickBooks, you can review this article: Undo or remove transactions from reconciliations in QuickBooks Online. 

Please get back to us if you have further questions regarding this matter. The Community is always here to assist you.