How to file VA Special Monthly Compensation (SMC) — additional pay above 100% rating

5-step Schema.org HowTo for SMC. SMC-K ($139.87/mo per anatomical loss, stacks) widely under-claimed. SMC-L through SMC-R.2/T pay $4,900.83 to $11,271.67/mo (veteran alone) in place of the basic rate. VA Form 21-2680 aid-and-attendance examination, lay-evidence rules (38 CFR 3.159), SMC level identification (SMC-K through SMC-O + SMC-S housebound + SMC-T severe TBI), denial appeals.