No. The deduction for job expenses was eliminated, staring in 2018.
Even in the past, the deduction was only an
itemized deduction subject to the 2% of AGI threshold.
You may want to talk to your employer about switching you to an "accountable plan" for expense reimbursement (it does not get added to your W-2 as taxable income), instead of a fixed allowance. On the other hand, if the allowance is generous, you may be better off paying taxes on it.
