Part III: Information on Your Vehicle
Car and Truck Expenses
Part III of Schedule C-EZ should be completed if the taxpayer is claiming car and truck expenses in Part II.
The taxpayer needs to provide information about how the vehicle was used, its mileage, who drove it, and other data, as well as whether the taxpayer has written records to validate the data.
Taxpayers who claim car or truck expenses should maintain a written log of mileage.