Yes, you can deduct maintenance on your vehicle if it was used for work. It just has to be proportionate to the amount it was used. For example if it was used 60% of the time for work and 40% of the time for personal reasons, then you would be able to deduct 60% of the maintenance.

Follow the instructions below to enter vehicle expenses:

1. Select "Federal Taxes" at the top of the page

2. Select the "Deductions & Credits" sub-tab

3. Scroll down to "Employment Expenses" and select "Show More"

4. Select "Start" next to "Job Expenses for W-2 Income"

5. Select "Edit" next to your occupation(Or enter it when asked)

6. Continue forward through the screens answering the questions to enter your vehicle information and to enter mileage etc.

7. After entering your mileage you should arrive to a screen asking "Do You Want to Enter Your Actual Expenses?", answer "Yes". Here you can enter your gas expenses, repair/maintenance expenses, etc.

8. Continue entering your information until finished

Visit this link for more information on work expenses: Job-related Expenses