To claim your business expenses, you will need to upgrade to TurboTax Self Employed.
After you upgrade, enter your business expenses in the following area:
Type in schedule c in the search box, top right of your screen
Click on the first category Jump to
schedule c link
Follow the prompts and online instructions
Arrive at the Your Business page
Scroll down to the Business Expenses category in
which you will see the following:
Business
Vehicle Expense (where you will enter your vehicle/mileage deductions)
Other
Common Business Expenses (a number of your expenses may be
entered here)
Home Office Expense -if you work out of your
home