If you wish to deregister your vehicle, you must request a decommissioning. This also applies to trailers.
Once you have deregistered the vehicle, you are no longer allowed to drive it on the road or park it in public areas.
You can submit the application in person or your representative to the responsible licensing authority.
If you do not have your vehicle scrapped, you can usually reserve the vehicle's license plate for later re-registration for up to one year.