Thanks for following up this thread, @R_Crane.

Yes, you may enter a refund receipt in QuickBooks Online. Then, match it with the downloaded transaction from your bank feeds. If you decide not to create a refund receipt in the program, you can simply add or confirm the transaction downloaded in your online banking. 

Here's how to create a refund receipt:

1. Click + New, then Refund receipt.
   
2. Enter the name of the customer.
3. Choose a bank from the Refund from field where you take the money from.
4. Complete other fields, then click Save and close.

You can visit again this link for more details about the process: Void or refund customer payments in QuickBooks Online.

Once done, you can now match it with the downloaded transaction:

1. On the left menu, click Banking.
2. Select the bank. This is the financial institution you've selected on the Refund From field when creating the refund receipt.
3. Under the For Review tab, select the transaction.
4. Choose the Match radio button.
5. Click on Match.

For more details about this procedure, please see this link: Categorize and match online bank transactions in QuickBooks Online.

Let me know if you need anything else concerning the customer refund. I'm always around to help you.