Since he is not a resident of GA for tax purposes, his earnings from work carried out in Ohio are not taxable by GA, but they are taxable by both OH and his resident state of NJ.
Work physically carried out in OH is not GA-source income. It is OH-source income.
In the My Info section of TT, be sure to designate NJ as his State of Residence and to indicate that he had Other State Income from OH. He is not required to file a GA tax return unless he had earnings from work carried out in GA. (If he did have income from GA, in TT indicate that he had Other State Income from GA as well as from OH.)
In TurboTax, be sure to complete his non-resident state return(s) before you complete his home state NJ return. If he still qualifies to be claimed as your dependent, be sure to indicate that on his return.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
