Of the 50 states in this country, none of them have a new car return policy that is outlined in writing at the dealership or on websites. There is one option for customers should they might have second thoughts when purchasing a new vehicle. That option is to have the dealership add a clause to the contract stating you may return the car within a specific grace period, determined by the dealership, should the buyer find they do not like the car or do not need the car any longer. This can include financial hardship because of an emergency situation that has occurred since purchasing the vehicle.
For more info, see Can You Return a New Car?