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Tax   Forms
    2011 Tax Year

State of Illinois

Looking to file an extension? Below is the information for Illinois residents wishing to file for an extension of time to file for both federal and state taxes.

Federal Taxes

Complete IRS Form 4868 to receive an automatic six-month extension to file your federal income taxes. Form 4868 should be filed before April 18, 2011.

Download Tax Form

IRS Form 4868 Form 4868

Application for Automatic Extension of Time To File U.S. Individual Income Tax Return


Illinois State Taxes

Illinois gives taxpayers an automatic filing extension through October 15, 2011.

If you have a balance due, you must pay the amount you owe by April 18, 2011 to avoid penalties and interest. If paying by check or money order, complete Form IL-505-I and return it with your payment in the mail.

According to the Illinois Department of Revenue, Form IL-505-I must be postmarked on or before April 18, 2011.

Illinois Payment Voucher

Form IL-505-I

Payment for Automatic Extension for Individuals


Additional Useful Links

Illinois State Tax Forms
Includes Popular 2010 Illinois State Tax Forms
Help for Do-It-Yourselfers
Books and Guides to Help You File Taxes, and Reduce Your Tax Bill
Certified Public Accountants
Search for Qualified CPAs in Illinois

Tax Preparers
Find A Local Tax Preparer Anywhere in Illinois


NOTE: These addresses are believed to be accurate at time of transmission, and are provided with no assurance or warranty. Always double-check address listings on tax forms you download, as addresses may be subject to change without notice. and its associates are not tax advisors and do not provide tax advice. All tax forms are believed to be the most up-to-date from the Internal Revenue Service and individual tax agencies, and are provided to you with no warranty. Always consult the IRS or your tax professional if you have questions. For more legal information, please click here.





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