Long story, shortened - QuickBooks crashed in the middle of processing a credit card payment. In the end, the payment was applied to "QuickBooks Customer" not the actual customer's invoice.

My mistake was adding the "online payment" from the Record Merchant Service Deposits transactions. 

I can not edit the payment to change from "Quickbooks Customer" to the actual customer. I can not edit the corresponding Batch Deposit which remains "Ready to Record" in the Record Merchant Service Deposits window.

I need to apply the payment to the cardholder's invoice.

Thanks in advance.