Good morning, wtblack.
Thanks for reaching out here in the Community. I'd be glad to provide some info regarding the vendor credit you have in QuickBooks Online (QBO).
Vendor credits are usually applied when you go to make your next bill payment. Since your vendor has already credited or returned the funds to your card, you don't really need that vendor credit in QBO. You can delete the credit by:
1. Hovering over the Expenses tab, then click Vendors.
2. Enter the name of the vendor in the search field.
3. Locate and click to open the vendor credit.
4. Choose More, then Delete at the bottom of the page.
5. Click Yes to confirm.
Deleting this entry will remove any chances of the credit essentially being applied twice by linking it to a future bill payment. I always recommend speaking with your accountant to confirm these types of actions within your account.
Additionally, I have an article for you that I believe will come in handy. You can check it out here: Enter a credit from a vendor
Please don't hesitate to reach back out if you have any other questions about handling vendor credits or anything else. I'm only a comment or post away.