If i work in one state, but live in another, how do i file my taxes? do i put one as my state and the other as my associated state?

IF...if no taxes were withheld for Indiana on your W-2, AND...if your employer allowed it, they may have withheld taxes for MI.....then you do not indicate you worked in Indiana, and only file for MI as a MI resident..

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IN and MI are so-called Reciprocal tax states.  Meaning, a resident of one state, can work in the other and only be taxed by their home/resident state.

IF, however, your employer withheld IN taxes, then you would need to file a nonresident tax return to IN, indicating zero Indiana income to get those withheld IN taxes returned...since the reciprocal agreement between the two states only allow MI to tax that income.

If you have not turned in the WH-47 to your employer, you should to avoid the multi-state filing in the future.

If you do need to file both states, be sure to fill out the non-resident IN first to create a credit to go on your MI return.

See Which states have reciprocal agreements? - TurboTax Support

Great advice from @SteamTrain