In most states you should remove the license plates once the tower arrives and return them to the DMV. However, in the following states the license plates need to remain on the car: Alabama, Alaska, Arkansas, California, Delaware, Georgia, Hawaii, Kentucky, Louisiana, Minnesota, Oklahoma, South Dakota, Texas, Washington.
In the states of California and Arizona you must also turn in a release of liability as well. In Washington State this form is called a Report of Sale. On this form, you should fill in our name and address: Kars4kids, 1805 Swarthmore Ave. Lakewood, NJ 08701. For the vehicle purchase price you can fill in donation.