I am having the same problem.

I am NOT trying to match a DEPOSIT transaction.  So that solution is not applicable.

I am trying to match a WITHDRAWAL (paying the refund back) transaction.

The problem for me is the  WITHDRAWAL transaction  is LESS that the total REFUND.

(If I change the REFUND to a value, equal to or less than the WITHDRAWAL amount, the REFUND transaction shows up.)

I got the WITHDRAWAL amount from a third party (Sports Engine), that had offset a POSITIVE transaction with the NEGATIVE REFUND, thus reducing the amount they were requesting back from us.

I should be able to record the REFUND and click the RESOLVE/DIFFERENCE switch, to show why the amount was less, like we do for every other transaction.

(The claim that Sports Engine integrates with Quickbooks is a whole other issue   LOL)