Since you overrode, I am assuming that you are using the CD/download version that has the forms mode. Try switching to the forms mode and open the "Carryover Wks". Line 17 should have the 2015 AMT carryover and that *can* be changed without an override since it is a user entered item.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
