Which form can I use to enter the motor vehicle expenses in case I use my car for both personal and business use ?

If you are an employee (salary or commission-based) and have obtained form T2200 – Declaration of Conditions of Employment from your employer, you can use Form “T777” and Form “T777 AUTO” to claim such expenses.

You can find these forms in your “Forms Manager” by name “T777” and T777 AUTO”. However, if you are self-employed, you can claim motor vehicle expenses against the income you earn from self-employment on form T2125 and T2125 AUTO respectively.