Try using the steps to remove the old business vehicle from your return.

To delete your business vehicle in TurboTax Online:

1. Go to "My Account" in the top right corner

2. Select "Tools"

3. Under "Tools Center" select "Delete a Form"

4.  Navigate to " "Schedule C (Your Job) -- Car & Truck Expenses Worksheet (Your Vehicle)" and select "Delete" next to it

Another way to delete a business vehicle:

1. Select "Business" at the top of the screen

2. Choose "Continue", then "I'll choose what I work on"

3. Select "Start" next to "Business Income and Expenses"

4. Select "Edit" next to your business name

5. Scroll down to Business Expenses

6. Now select "Update" next to "Business Vehicle Expense"

7. Select "Delete" next to your vehicle

Select this link for more information regarding business vehicles: Business Use of Vehicles