Q: I am 57 years old and I have 34 years of service, including 21 years of active duty in the Navy. I have already paid my military deposit amount in full. My Thrift Savings Plan account has $200,000 in it. If I retire next year, can I get half of that amount in lump sum, and can I invest the remaining $100,000 in an annuity? If I can, when would I start receiving the annuity?    A: Yes, you may request a partial lump-sum withdrawal, if you have not already done so, and then later request a full withdrawal…