(a) If you are in CSRS by mistake and belong in CSRS Offset, FERS, or Social Security-Only, your employer must begin withholding Social Security taxes by changing your retirement coverage to CSRS Offset. Your employer must begin this withholding as soon as possible after the error is discovered.

(b) Your employer will correct your retirement coverage back to the date the error first occurred once you are notified of the error and have an opportunity to make any elections that you are eligible to make.

(a) If your qualifying retirement coverage error was not previously corrected, the amount erroneously withheld for CSRS retirement deductions will be:

(1) Used to pay your new retirement deduction amount; and

(2) Applied toward any Social Security taxes you owe for the time you were in the wrong retirement plan.

(b) You will get Social Security credit for all the time you were erroneously covered by CSRS. Your employer will send the Social Security Administration a record of your earnings for all the years you should have had Social Security coverage.

(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.