If you made contributions to the TSP after your qualifying retirement coverage error was previously corrected, OPM will compute the lost earnings on your make-up contributions to the TSP under the following circumstances:

Open Table
You were in: And were
previously corrected to:
And under these rules you elect:
CSRS FERS FERS.
CSRS Offset FERS
Social Security-Only FERS No election required.
Social Security-Only CSRS
Social Security-Only CSRS Offset

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