2016 Car Donation Tax Deduction - How To Get The Maximum Tax Benefit Out Of Your Vehicle Donation.Donating your car or vehicle to charity can be a great way to get a tax deduction, and Wheels For Wishes makes it easy. If you would like to help your local Make-A-Wish® and get the maximum tax deduction, then you're already almost done. It's as simple as filling out the little form to the right or calling 1-877-431-9474. We make the process easy, and you get the most good (and highest tax deduction) for your car. Not only that, but you are also helping a local child's wish come true.How Car Donation Tax Deduction Works.Car donation has tax benefits.Prior to January 2005, the IRS was allowing people who donated to a qualified car donation program to take a tax deduction based on their vehicle's market value no matter how much or how little the vehicle sold for. Determining the market value of a donated vehicle is often quite difficult and time-consuming, which made determination of the amount of the tax deduction confusing. Fortunately, as a result of the new tax law that went into effect in January 2005, the IRS has taken the guesswork out of determining the value of your donated car, truck, RV, boat or other vehicle.