where do I find Ohio adjusted gross income? is it box 1 on my w2?

No, your AGI is not on your W-2.   If you have prepared your OH return your OH adjusted gross income is on line 3 of your Ohio IT1040 tax return form.

 Ohio adjusted gross income is calculated by applying Ohio additions and deductions to federal adjusted gross income, as reported on the federal form 1040. It is reported on Ohio formIT-1040 line 3

ohio.gov

 To preview your form in TurboTax online:

1. Open or continue your return by selecting Start or Continue.
2. Select Tax Tools from the menu.
3. With the Tax Tools menu open, you can then:
4.  select View Tax Summary in the pop-up, then OH tax summary in the left menu.

If using TurboTax Desktop, switch to form mode to check OH Form IT-1040