Yes, you may reduce your Ohio business income deduction (BID), in order to claim the Joint filing credit (JFC).
But, TurboTax is not capable of making the decision for your or comparing options. You have to decide the amount. "Usually", you just need to end up with $500 profit. So use all but $500 for the BID. But beware of the JFC income adjustments from Schedule A. Review the JFC allocation worksheet.
