Thanks for coming back and clarifying things out, tom. 

I've already updated my response above. Since the Set Credits option is available only on the Windows version, you can use the Pay bills and manually select the credit and deposit from the Pay bills screen. Kindly refer to the steps above to link the deposit to the credit.

Don't hesitate to reach us back so we can assist you further with vendor refunds, bills, or QuickBooks in particular. Stay safe always.