For each taxing school district in which you lived, you are only taxed on the income received while you were a resident. Here's how to become an Ohio resident, changing residency from one state to another, and Ohio residency requirements you need to know.1. The Residency Affidavit must filled out completely and signed before a notary public. The Residency Affidavit must be renewed each school year. In general, residence for school purposes is determined using the residence of the child's parent.