for Schedule C in individual income tax, how do I calculate the expense for transportation of 5725 total miles traveled, entertainment in total of $4200 and gifts of $450? I know only up to $400 can be deducted in gifts but do I just put 0 can be deducted. for Schedule C in individual income tax, how do I calculate the expense for transportation of 5725 total miles traveled, entertainment in total of $4200 and gifts of $450? I know only up to $400 can be deducted in gifts but do I just put 0 can be deducted