Reproducible copies are available throughout the year.
For further information about tax publications or forms contact the local U.S. Internal Revenue Service Office or the local office of the Illinois Department of Revenue . Federal tax forms are also available online at the IRS website . Illinois tax forms are available at the Illinois Department of Revenue website . The National Association of Computerized Tax Processors maintains a site with links to state tax forms and revenue departments. The Documents library also maintains a list of state home pages from which you could find your state's revenue department.