The original question and replies (even though dated 2019*) are out of date. The law changed, beginning in 2018. W-2 employees are not allowed to deduct job expenses, including mileage. A "car allowance", from the employer, is taxable income to the employee.
*TurboTax "upgraded" this forum in 2019 and all older posts transferred with a 2019 date, even though they are actually older.
