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MAIN Arrow to TaxesTaxes Arrow to IRSIRS Arrow to Illinois TaxesIllinois Taxes

illinois state sealIllinois imposes a flat 5 percent of a taxpayer's federal adjusted gross income. Illinois residents must file their personal income tax using the Illinois Individual Resident Income Tax Form (IL-1040) by April 15. When that date falls on a weekend or holiday, filers get until the next business day to submit their state returns.

This year, the filing deadline to submit 2018 IRS tax returns is Monday, April 15, 2019.




Illinois Tax Help

Where's my Illinois tax refund

1 800 732-8866
1 217 782-3336

Business Hotline:
1 217 524-4772


Illinois Department of Revenue - Downloadable forms, instructions, how to's information, and resources.

Illinois Individuals Index - Forms and instructions on direct deposit of refunds and filing electronically.

Illinois Forms Index - Downloadable PDF forms for individual IL-1040 and business taxes, business registration forms, tax exempt, withholding and other Illinois state tax related forms.

Illinois Electronic Filing - Information for tax professionals with the application to file Illinois income tax returns electronically, individual income tax electronic filing declaration, fill-in forms, instructions.

Illinois Publications Index - Tax publications, taxpayer guides, annual reports, reference manuals and statistics.



Running late? Illinois Tax Extension Forms


...also be sure to file your Federal tax extension form.

Prior Year IL-1040 Illinois Individual Income Tax Forms
2011 2012 2013 2014 2015 2016

 

Where to mail FEDERAL IRS tax forms within Illinois:

IRS Form
If you ARE NOT enclosing a payment, use this address: If you ARE enclosing payment, use this address:
1040:
Department of the Treasury
Internal Revenue Service
Fresno, CA  93888-0002
Internal Revenue Service
P.O. Box 802501
Cincinnati, OH 45280-2501
1040A:
Department of the Treasury
Internal Revenue Service
Fresno, CA  93888-0015
Internal Revenue Service
P.O. Box 802501
Cincinnati, OH 45280-2501
1040EZ: Department of the Treasury
Internal Revenue Service
Fresno, CA  93888-0014
Internal Revenue Service
P.O. Box 802501
Cincinnati, OH 45280-2501

 

Other useful Web links to IL taxpayers associations, CPA groups,
business organizations or general U.S. state tax how to's & information :

Taxpayers Federation of Illinois



Related Tax How To's :

  How to Avoid an IRS Audit Tax Tips & Tricks

 

IRS Tax News

IRS Tax News & Updates

 

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