Before making any entries, see the Note below, and if applicable, complete the worksheet in the instructions. Information about Form W4, Employee's Withholding Certificate, including recent updates, related forms and instructions on how to file.Form I-9 is available in Spanish. Only employers located in Puerto Rico may complete the Spanish version of Form I-9 instead of the English version. Additional withholding amounts To ask your employer to withhold an additional amount each pay period, complete lines 3, 4, and 5 on Form IT-2104, as applicable. You may begin the online application process, or download a paper application to print on your own here. Use the CUNY application to apply to any of our associate or bachelor's degree programs as a first year or transfer student. Illinois law provides the Certificate of Error procedure to allow the Cook County Assessor to apply changes to a property tax bill that has already been issued. If you fill out a form on a webpage, you will lose your progress. Employee's Withholding Allowance Certificate.