You can find your OH modified adjusted gross income by looking at your Ohio tax form. Usually it is your line 3 income. For complete accuracy, page 8 of Tax Year 2024 states: Modified adjusted gross income (MAGI) is your Ohio adjusted gross income (Ohio IT 1040, line 3) plus your business income deduction (Ohio Schedule of Adjustments, line 13). If you did not take a business income deduction, your MAGI matches your Ohio adjusted gross income.