State tax filing

Just to clarify, I currently live in MN with a friend, I help her with rent, but am not on the lease.

Also, in years past, I have only filed with MN.

 

Do I need to correct prior filings?   

The LLC is still in its starting phase and has not generated income yet.

 

I wouldn't say I am part year resident, as I am nearly in MN as much as I am in Iowa, because I go back to Iowa frequently, I just work Monday thru Friday ( mostly, in MN) .      Sorry, for all the questions, but how do I correct this and do I file for both?