State laws differ so you will need to check with your state's Department of Motor Vehicles or other state agency that is requiring you to carry the SR-22 to find out what will happen if you cancel it before the end of your mandated time period.

In many states if you have your SR-22 cancelled or chose to not carry it for the full period of time you were supposed to have it for your license will be suspended.

Obtaining and maintaining a sr-22 is required in many states to have your license reinstated and if you do not keep up the SR22 then your driving privileges are suspended or otherwise taken away.

Since the penalty for canceling a SR-22 varies by state your DMV will be able to give you the best and most accurate information.