Where should I enter a tuition credit as a MA state employee for 1098-T? Should I include it under "other financial aid" under employer assistance?

[DaveF1006]

Yes, this is where you will put this.

[Hal_Al]

In most cases you don't enter it at all.  But, it depends on how the school reports it on the 1098-T.

If the school includes it in box 5 but also includes the amount of tuition it paid, in box 1, it's a wash and doesn't need to be reported.  

The MA tuition "credit" is actually a tuition waiver or remission. It is not usually shown in either box 1 or box 5 and you ignore it at tax time.