With respect, you should read the list of steps that you suggested an average customer follow in order to do a very simple task.  Your suggestion is not reasonable.  

The request is simple.

Quickbooks... Please allow our customers to pay multiple invoices through whatever payment gateway to pay their entire open balance in one shot.  A simple way to pay their balance in full.

It is not complicated request and it shouldn't require us to go down a check list with 10 action items and 45 extra clicks.  This should have been a priority years ago when I, (and many others) made this same plea to the development team.  

Can anyone explain why this hasn't been done and more importantly, when it will be implemented?  There are zero reason why this wouldn't be useful to every Quickbooks customer. 

We need a "Pay in Full" option.