These expenses are job-related expenses.
Up to tax year 2017, job-related expenses were deductible as an itemized deduction subject to the 2% of AGI floor.
Under the Tax Cuts and Jobs Act, the itemized deductions for job-related expenses subject to the 2% of AGI floor are suspended for expenses incurred after December 31, 2017 through 2025.
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You may deduct the cost of the vaccinations as an itemized medical expense on Schedule A. Only total medical expenses in excess of 7.5% of your AGI count toward your itemized deductions.