In order to answer your questions, it's necessary to clarify your legal residency status during 2018.
Was your domicile (your main, permanent home) in Missouri prior to your move to Iowa, or were you only living in Missouri temporarily for the purpose of attending school?
If you were only in Missouri temporarily for school, where was your domicile during that time?
Did you maintain a permanent place of residency in Missouri in 2018? (A permanent place of residency would be (for example) an apartment you rented - as opposed to a college dorm.) If yes, were you in Missouri more than 183 days in 2018?
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
