As a rule of thumb, state-specific items which don't affect the federal return would normally be found under State & Local > Modifications.  And it is for MA 529 contributions.

The other I/D expenses would normally flow through to states automatically, which are then allowed/disallowed based on state law.

Items entered in Schedule A that do NOT really work for the 1040, will carry to the state return. That should handle all but the 529. 

Find the search box at the top of the column you get when you click the < in the upper left. 

I think the 529 is MA Modifications > Prepaid tuition or college savings program deduction on Schedule Y

😄

THANK YOU!!!!!!!!!! you are amazing - I found this tip super helpful and helped my client saved $100 🙂