You are not going to get a lot of guidance from the program in this regard and there is no actual "change form" in the program. The program will check the Amended return box on your 1120-S and K-1(s), however.

The best you can do is to enter the changes (after saving your original return under a different filename) and then use the Miscellaneous Statement form and enter line number (and Schedule, if necessary) along with the reason for the change and the amount.

Thank you tagteam for the answer.  Is there a way to add a Miscellaneous Statement form in TurboTax Business?