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I would think the self-support part would be required, if the individual is going to claim a change of state residency....but that's more of an opinion, than any legal requirement that might exist (and we can't give legal advice).    Not sure either of the states would pick up on it right away though...except that KY sees you are living and working in KY, without being a dependent of your OH parents....that implies you are independent and they are going to be pushing to get their taxes from you for  after you moved out of OH.....and be on your case for not having a KY drivers Lisc, and vehicle registration/tags/insurance minimums.

____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*