How Can you find out your VIN from your reg on your car?

If your asking the location of your VIN on your vehicle, there is always a VIN plate on the driver side dash, visible through the windshield. Usually through a small cutout.

There is also a sticker either on the driver door near the latch, or on the unibody near the nader pin on the frame of the car.

There is also 3rd VIN stamped into the Frame of your car. Contact your dealer to find specific location.