If you received a qualified reimbursement for U.S. Postal
Service employees, you can use this reimbursement amount as your deduction for
transportation expenses. If your actual expenses are more than your allowance,
you will need to complete Form 2106 and take an itemized deduction for your
expenses. If you received a qualified reimbursement, you will have to keep
track of your actual expenses – you cannot use the standard mileage rate.