An SR-22 is a document required as proof of financial responsibility under state law or court ordered for persons convicted of certain traffic violations. The laws and regulations regarding the terms for carrying an SR-22 vary from state to state but generally it is for three years.
In Rhode Island, the filing requirement period varies and is set by the court.
To find out the specifics for Rhode Island contact your local Department of Motor Vehicles. Some judges are able to extend or shorten the time requirement based upon circumstances.