You can’t deduct meals just driving around town because you would have to eat anyway, and ordinary living expenses are not deductible. (You could bring a brown bag lunch instead of paying for take out, for example.) You are only allowed to deduct meals if you have traveled far enough away from home that you require an overnight stay. In that case, you can deduct 50% of your actual meal cost or 50% of the federal meal & incidentals rate, which can be found on the IRS website.
