How do you get tanker endorsement?

To obtain a tanker endorsement, you must first hold a valid commercial driver's license (CDL). Then, you need to pass a written knowledge test specific to tank vehicles, which covers topics like safe handling and transportation of liquids. After passing the test, you may also need to demonstrate practical skills during a driving test, depending on your state’s requirements. Finally, you’ll pay any applicable fees to have the endorsement added to your CDL.