If a veteran receives a retroactive service-connected disability rating determination, how long is the statute of limitations on filing a claim for a refund? Six months from the date of the determination for claims filed after June 17, 2008. Two years from the date of the determination for claims filed after June 17, 2008. Three years with a possible 1-year extension from the date of the determination for claims filed after June 17, 2008. Four years with a possible 1-year extension from the date of the determination for claims filed after June 17, 2008