Q: Let’s see if I’ve got this right: If I request monthly withdrawals from my Thrift Savings Plan account and change the amount each year, I’ll be able to receive a monthly check for life and still be able to build my principal, which I can pass on to my children or grandkids. Does TSP have such a plan? What option is it and how does it work? If I need some emergency money, would I be able to make a withdrawal from my principal? A: You may request a full withdrawal as fixed monthly payments. You set the amount,…