Here are some resources that you as a retiree might find useful.
Thrift Savings Plan
All the information about accessing and managing your TSP account.
Have you checked your beneficiary designation lately? Learn how to make sure your beneficiary information is accurate and updated.
Office of Personnel Management
Numerous resources for retirees, provided by OPM.
Social Security Administration
SSA offers an online retirement application that you can complete in as little as 15 minutes. You can apply from the comfort of your home or office at a time most convenient for you.