File wages only in MI, but pension, SS, and IRA withdrawals while living in both MI and MT when I changed permanent residency from MI to MT on 9/5/17?

I have had a home in both MI and MT for 13 years. We spend roughly 6 months in each but it varies some. Last year we were in MI winter and summer and in MT spring and fall. We established MT as our permanent residency on 9/5/17. We work jobs for wages in only MI. My wife gets monthly pension and I get SS and IRA monthly payments.