From your personal home page, click the Withholdings & SSN card — or open Withholdings from the sidebar.
Click the Update SSN button.
Enter your correct SSN and confirm the rest of the form details.
Submit to save.
Note: An incorrect SSN can affect your tax filings and W-2. If you've already had paychecks issued under the wrong number, contact your HR administrator so any tax reporting can be corrected as well.