Unfortunately, if you are an employee (Paid with a W2 not a 1099), beginning with your 2018 Tax Return, you can no longer deduct "business mileage".
The Tax Cuts and Jobs Act (TCJA) that was signed into law in December of 2017 eliminated all "Miscellaneous Itemized Deductions" formerly allowable on your Schedule A. This includes all for "unreimbursed employee expenses", including business mileage.
For more information, please check out this TurboTax article. 2018 Tax Reform Impact: What You Should Know.
