A mixture of CUE and SMC. Everyone thinks you have to file a CUE to win retro SMC. Not so. Buie v Shinseki says it's due when owed regardless of the day you figure it out. You don't have to file a claim either. VA is supposed to "infer" the entitlement. When they don't you call them out. It doesn't require a 526 or a 995 either. I'll take some VBMS screenshots of the VA's "SMC calculator". Why would anyone construct something that is always wrong? No. Kinda like a broken clock but a broken clock is right at least twice a day. Not so a SMC calculator.