It depends on how you use your car. IRS Publication 521 doesn't state a limit on how many personal cars are allowed the mileage moving deduction. The IRS rules that say if you use your car to take yourself, members of your household, or your personal effects to your new home, you can figure your expenses by deducting either:
Your actual expenses, such as the amount you pay for gas and oil for your car, if you keep an accurate record of each expense, or
The standard mileage rate of 17 cents a mile.
Whether you use actual expenses or the standard mileage rate to figure your expenses, you can deduct the parking fees and tolls you pay to move. You can't deduct any part of general repairs, general maintenance, insurance, or depreciation for your car.
Member of your household.
You can deduct moving expenses you pay for yourself and members of your household. A member of your household is anyone who has both your former and new home as his or her home. It doesn't include a tenant or employee, unless that person is your dependent.
The members of your household don't have to travel together or at the same time. However, you can only deduct expenses for one trip per person. If you use your own car, see Travel by car, earlier.
IRS Publication 521 has an illustrated example on publication page 12.
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here for a link to IRS Publication 521 that contains more information.
