If you are using TurboTax Desktop, you should be able to enter all information about vehicle expenses in the T2125 form, page 9, under the Chart A section.

In TurboTax Online, in Self-employment section, after you entered all information about your business and income, you will have the expenses section. You will need to add all expenses type you have , like car expenses.

All you have selected, will show on the page (like a summary) of expenses type. You just have to click start and enter the information. 

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