Well..all your income is taxable...
BUT
MI and OH have a reciprocal tax agreement, whereby a cross-border w-2 worker is only taxed in their home state on that income.
So if you filed the proper paperwork with the non-resident state employer, then that employer only withholds taxes for your Home/Resident state (or, sometimes, no state withholding at all). And when they do that, you do NOT indicate that you worked in another state on the MyInfo page since all the income is treated as-if earned only in your Home/Resident state.
IF the other state's employer did withhold state taxes, then you may have to indicate you worked in another state (that non-resident one) and indicate zero income there to get all the withholding back .
(states vary on how to do this exactly...a few have a special form that makes it simpler...I'm not sure what OH or MI do....and you never indicated which state you actually live in)
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
