Unfortunately, if you are an employee (Paid with a W2 not a 1099), beginning with your 2018 Tax Return, you can no longer deduct your employment related expenses.
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 "unreimbursed employee expenses".
For more information on this new limitation as well as
other changes that may have an effect on your return, check out this TurboTax
FAQ: How
Will New Tax Legislation Affect My 2018 Tax Return?