The Tax Department is streamlining withholding tax and wage reporting forms and Web File applications. Learn about income tax withholding and estimated tax payments.Complete Form W-4 so that your employer can withhold the correct federal income tax from your pay. Give Form W-4 to your employer. Request to withhold taxes. Submit a request to pay taxes on your Social Security benefit throughout the year instead of paying a large bill at tax time. At the time of retirement you will need to instruct OCERS on your tax withholding election.