Q: Did I overpay to get credit for my military service? According to a Government Executive newsletter article (Jan. 15, 2010, issue), Federal Employees Retirement System employees were supposed to pay 3 percent of the base pay they earned during military service in order to get retirement credit for that service, while Civil Service Retirement System employees were to pay 7 percent. I paid at the 7 percent rate in 2002 although I was a FERS employee at the time. Specifically, although I began as a federal employee under CSRS in 1976 after my military service, I voluntarily switched to…