It doesn’t have anything to do with automotive sales. If the amount was more than $600, the bank would have been required to issue a 1099-MISC with the income in box 3. You are legally required to report all income, even if you don’t receive tax paperwork for it. Other Income is the correct place for income that is not earned from working and is not a special designated type of income (like investments or retirement, which have their own special forms).
