Well that assumes that the customer is aware of the problem and knows how and where to override it. Not everyone knows all the nuances of how things are supposed to tie together...and they bought software that's supposed to make them not have to. How many customers can we suppose have not noticed the error of the software and lost out on the carry-forward?
I had a similar error many years ago where the software was giving me a tax credit that was I didn't earn. It was a simple subtraction between two numbers on the same form with an "if" criteria. They weren't doing it right. After much back and forth with them they said "we stand by our software" Ha, I overrode the software and sent a note to IRS telling them the situation. I'm sure the IRS would have frowned on me taking a $7,000 credit (not a deduction) on my taxes due.
