Are you an independent contractor --- or a W-2 employee?
If you are an independent contractor your mileage goes on your Schedule C with your other business expenses.
If you are a W-2 employee you cannot deduct mileage on your federal return. Your state laws might be different.
https://ttlc.intuit.com/questions/4482873-which-federal-tax-deductions-have-been-suspended-by-tax-re...
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