I'm determined to ensure you can continue the steps in recording a refund, @cjd1111.

To select the Accounts Payable account, simply click the drop-down list under the Account column. See the screenshot below.

Additionally, you can also apply credits toward any open or future bill. Refer to this article: Enter a credit from a vendor.

Get back to me if you have other concerns about applying vendor credits. I'll be around to answer them all for you. Keep safe and have a good one!