Q. I retired under FERS two years ago, and I haven’t needed to touch my Thrift Savings Plan account so far. I am receiving Office of Personnel Management, Social Security and military retirements. I am 68½ years old. I just received a 100 percent Veterans Affairs Department disability award, which will change my taxable military retirement to a nontaxable VA retirement. I don’t think this will have any effect on my long-term life expectancy. I have determined that I do not want to elect an annuity on withdrawing from my TSP. I am considering immediately starting a monthly TSP withdrawal…