The rules for determining

The rules for determining the amount that a donor may deduct for a charitable contribution of a qualified vehicle, including an automobile, with a claimed value of more than $500 changed at the beginning of 2005 as a result of the American Jobs Creation Act of 2004. In general, that Act limits a donor’s deduction to the amount of the gross proceeds from the charity’s sale of the vehicle.

For vehicles valued at over $500, taxpayers are required to attach the charity's written acknowledgment to their tax return.^[2]