I live in Indiana and work remote in Massachusettes. I am filing a non-resident state tax return. How should I answer ="Total wages earned outside of Mass"?

If you did not have any taxes withheld from MA, you will not need to file a Non-Resident return for MA. 

If you did have taxes withheld and you are trying to claim a refund, then you will enter the full amount of your wages as the amount earned outside of the state. 

(Edited 2/20/2025) @cowan1colleen 

Unless your employer mistakenly withheld MA tax, you do not need to file a MA return.  MA does not tax remote workers.  If you occasionally did physically work in MA, the answer would be different.