Yes, some of your mileage is deductible. You are only allowed to count the mileage (one way) between your first and second
jobs. The mileage from your home to your first job or from your second
job to your home is not deductible. You must work at both jobs on the same day. If you have the day off from
your first job, you cannot deduct the costs of commuting to your second
job that day.
Include mileage for commuting to a second job as miscellaneous
deduction when itemizing. Miscellaneous deductions are limited to the
amounts that exceed 2 percent of your adjusted gross income. For example, if your adjusted gross income is
$100,000, you can only deduct miscellaneous expenses over $2,000. This
amount is the total for the Miscellaneous Expense category, not just your mileage deduction.
In Turbo Tax, the mileage is entered in the Employment section of Deductions and Credits, as Job-Related Expenses.
More information can be found here: IRS Publication 463
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