Complete your amended return as if you are filing the return for the first time. Submit all the forms relevant to the information in your amended return.You are required to file withholding certificates when you begin employment with the City of New York or transfer to another agency. The Iowa IA W-4 (44-019) is available online. Child Support Forms ; 4-8c. Information about Form W-2, Wage and Tax Statement, including recent updates, related forms and instructions on how to file. If you are trying to locate, download, or print state of New York state tax forms, you can do so on the New York Department of Taxation website. If needing to amend a withholding form, check Box A, "Amended Return" and complete the form using your corrected withholding information. What form do I fill out? This will eliminate your tax liability for that state, resulting in a full refund.