February 23, 2018 19:02 Updated Follow You can log on to your secure online account to change your federal income tax withholding election. Alternatively, you may print off the Form W-4P, which is available to download from the IRS website here. Related articles How are federal tax withholding rates for my INPRS retirement benefit calculated? What if I don’t know my username and password to log on to my PERF or TRF account? Where can I find additional information on federal income tax withholding? How do I retire from the Public Employees' Retirement Fund? How does a lump sum payment at retirement affect my taxes?