Sign into your account and
click "Take me to my return"
In the Search box (upper right of program)
search "schedule c" and click the "Jump to" link from results
If you have already entered
income, select Edit next to your business (if you have not entered income, do that
first, then TurboTax will guide you through entering your expenses)
On the next page, scroll down
to Business Expenses and select Start/Update next to Business
Vehicle Expenses
On next screen, select Edit next to vehicle(s). TurboTax will guide you through several questions about the vehicle and then you will get to the page where you can edit the mileage.
