Why did my TSP Catch-up stop?
Your TSP Catch-up election does not carry over from year to year. You must re-enroll each year. If you didn't re-enroll during Open Season, you may enroll in TSP Catch-up by selecting "Enroll Anytime" and enter your pre-tax and post-tax elections. Be sure to complete the entire Enroll Anytime process and select Enroll Me Now at the end to save your elections.