5 C.F.R. § 839.903 What happens to the Social Security taxes I erroneously paid when my employer corrects my retirement coverage to CSRS?
Title 5 - Administrative Personnel
(a) Except for the last 3 years, the money you erroneously paid into Social Security will remain to your credit in the Social Security fund. The Social Security Administration will include all but those last 3 years in determining your eligibility for, and the amount of, future benefits. (b) The amount you paid into Social Security for the last 3 years will be used to help pay your CSRS retirement deductions.
Title 5: Administrative Personnel
PART 839—CORRECTION OF RETIREMENT COVERAGE ERRORS UNDER THE FEDERAL ERRONEOUS RETIREMENT COVERAGE CORRECTIONS ACT
Subpart I—Social Security Taxes
§ 839.903 What happens to the Social Security taxes I erroneously paid when my employer corrects my retirement coverage to CSRS?