I am confused over the term “Years of Service” used in DFAS disability pay calculations for Reserve/National Guard. Which of these is it: (a) the 27 years stated as “Basic Pay” on my retirement orders or (b) the 12 years stated as “Disability Retirement” on my retirement orders? My understanding is that (b) is my total guard retirement points divided by 365. I’m PDRL at 70% DoD, 100% VA (all combat) and over age 60. On the DFAS calculator, I must enter a figure for Years of Service, but do not know what number to enter. Would someone please define “years of service” for me? I understand that my retired pay will be limited to my length of service pay, but I don’t know how to figure my length of service pay because I don’t know what “Years of Service” means in the calculation.