A vendor bill paid twice (overpaid). How do I record this?

Good morning, @MKT22191.

How are you today? I hope you're doing great! I'm happy to help you out with entering your vendor credit. 

In QuickBooks Online, there are different ways to enter vendor credits. It all depends on the purpose of the credit for how you'll enter it. Such as: 

• If you enter expenses or write checks
• If you enter bills, you plan to pay later
• Deposit a vendor credit when no expense has occurred
• Record vendor refunds on a credit card

Reading what you've mentioned, it sounds like the third option best suits your business needs. With that said, I've gone ahead and included some steps you can follow to enter the credit below. 

1. Click on the + New button.
2. Select Vendor credit or Receive vendor credit.
3. In the Vendor dropdown, choose your vendor.
4. Depending on how you record purchases with this vendor, enter the Category details or Item details. Usually, this is the category, product, or service you're getting credit for.
5. Tap on Save and close.

Once you're ready to apply the credit, check out Enter vendor credits and refunds in QuickBooks Online. You can also see the steps for the different reasons to enter vendor credit that I shared above in this help article. 

Please don't hesitate to let me know if you have any questions or concerns. Have a good one!