The official location for import duty is at Seccion Arbitrios Vehiculos de Motor.It is better to contact this office by phone to get a detailed updated idea about what exactly is the amount of tax and duty one has to pay for import while shipping cars to Puerto Rico. Just giving the information on what the make and model of the car a person is planning to ship to Puerto Rico would enable the officers to calculate the exact import duty and tax involved for shipping cars to Puerto Rico. The only thing that would be required to get this information is to make the queries in Spanish. Generally Puerto Rico has import excise tax on many items imported and in particular the import excise tax involved while shipping cars to Puerto Rico is on the higher side.