Q: If I retire May 1 at age 55 under the Civil Service Retirement System with 34 years of service, can I leave my $60,000 in the Thrift Savings Plan for a year or two and then, after seeing how life as a retiree goes, start up periodic payments? Or do I have to decide what to do with my TSP account right away? A: You can delay the decision for as long as you like. You won’t have to start taking withdrawals until you reach age 70 1/2.