Basic concepts:
- If you are a resident of state A and working in state B, you owe income tax to state B on your income from state B as a non-resident, and income tax to state A (your permanent home) on all your world-wide income.
- Your domicile is your permanent home. You will generally owe a resident tax return for all your world-wide income to the state where you are domiciled. There is no single factor that determines domicile, but some of the factors are where you actually live, where your significant social relationships are, where your children attend school, where your regular doctor and dentist are, and so on. You can live in multiple places, but you only have one domicile at a time. Just moving to another place does not automatically change your domicile, you also have to take active steps to give up your previous domicile.
In your case, it sounds like NYC has continuously been your domicile. That means you are considered an NY/NYC resident, and will file a resident tax return that reports and pays tax on all your world-wide income. (We don't have to consider the "convenience of the employer rule" because you are an NY resident. That rule affects non-residents who work for NY employers.)
You need to first prepare an Ohio non-resident return that reports and pays tax on your Ohio-sourced income (income paid to you while you lived in Ohio). Then, you prepare a NY resident tax return that will report all your world-wide income for the year. NY will give you a credit for the Ohio taxes that you paid, but since the NY taxes are probably higher, you will probably end up owing some money to NY. In Turbotax, you will prepare the Ohio return first, so the credit populates the NY return properly. Tell Turbotax you were a full-year resident of NY, and then it will ask if you earned money in any other state.
