Enter your 1099-R, in the federal section, normally. When you get the the Ohio program, you will be given a chance to re-enter your retirement pay as a deduction. That is, your federal AGI, including military retirement, is transferred to the state return (line 1 of form IT 1040), You then take a deduction on line 26 of schedule A, which transfers to line 2b of IT 1040.
