If you lived in OH the whole year, I would consider you a resident of OH. However, there are exceptions as listed in the TurboTax FAQ below.
I determine it by asking "where do you come home to after school/work?"
Once you graduate and move to another state, your residency will move to that state.
You can always review the different situations and see examples in the TurboTax FAQ below:
https://ttlc.intuit.com/replies/3301816
