Buying a car tax deduction

[Colin Spivey]

I am planning to get my real estate license this summer. I also will have to purchase a vehicle around the same time. If I waited to purchase a vehicle until after I got my license, could I use it as a deduction by saying it is a business expense due to needing a car to drive clients around? If so, what would I need to have/do in order to provide evidence and prove this?