If you are an employee being paid with a W-2, then job-related expenses are not deductible on your Federal return.
They can still be entered into TurboTax because they may be deductible on your state return, since some states did not comply to the tax law changes.
See the TurboTax articles below for more information.
https://ttlc.intuit.com/replies/3300622
https://ttlc.intuit.com/replies/4800418