Thank you JohnS for the excellent step-by-step! Just to make sure, after I press Credit Card button on settling amount, it still gives me the red box with Change due... That is supposed to happen, right? I am guessing that is just hardcoded into the program?
My follow-up question: I have also followed your other guide on Printing Change Due & Amount Tendered on Receipt. It works great! Now, after doing this new credit card tip method, my receipt registers it in the change due section, as well. Is there anyway for the system to recognize that when I settle transaction with Cash, it will show extra amount in Change Due and when I settle with Credit Card, it will show in Credit Card Tip (which it does)?
Once again, your help and guidance is much appreciated.