Illinois Income Taxes and State Tax Forms

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Prepare and efile Your Illinois State Tax Return

With the online tax software, it is easy for you to prepare and efile your Illinois state tax return and federal tax return together or separately (view the federal tax return filing requirements). The efile software helps you choose all the right state and federal forms, and you can prepare and efile as many state returns (resident, nonresident, or part-year resident) as you need for one price.

Illinois Income Tax Filing Deadlines

The regular deadline to file an Illinois state income tax return is April 15.

Tax Deadline DateType of Income Tax ReturnFiling Deadline / Due Date Description
April 15, 2015 2014 Illinois State Tax Return Due date for Illinois State Income Tax Returns - income tax filing deadline
April 15, 2015 2014 Illinois State Tax Extension Due date for Illinois automatic extensions (and payment due date if tax is owed)
October 15, 2015 2014 Illinois State Tax Return Last day to efile a 2014 Illinois State Income Tax Return for tax extension filers and late efilers

View all state tax return filing deadlines here.

Find federal income tax return filing deadlines here.

Illinois State Tax Forms

All of the following Illinois state tax forms are supported by the software:

Form/ScheduleDescriptionCan I efile this form?
Form IL-1040 Individual Income Tax Return

Form IL-1040ES  Estimated Income Tax Payments for Individuals  
Form IL-1040V  Payment Voucher for Individual Income Tax
Form IL-1040X Amended Return  
Form IL-1310  Refund Due a Deceased Taxpayer  
Schedule CR Tax Paid to Other States Credit
Schedule G Voluntary Charitable Donations 
Schedule ICR Illinois Credits (Education Expense Credit)
Schedule ICR Illinois Credits (Property Tax Credit)
Schedule M Other Additions and Subtractions  
Schedule NR  Nonresident & Part-Year Resident Computation  

Illinois State Tax Forms that Cannot be efiled

Illinois Tax Withholding Form

Form IL-W-4 Illinois State Employees Withholding Allowance Certificate

IL Tax Extension

Extension FormIllinois Extension InstructionsHow to File

No form

Illinois grants an automatic six-month extension of time to file your state tax return. You do not have to file any form with Illinois to take advantage of the extension. The extended filing deadline is October 15, 2015.

If you received an extension of more than six months to file your federal tax return, you are automatically allowed to receive the same extension of time to file your IL state return.

The IL state tax extension is an extension of time to file, not to pay. If you owe state tax, you must also make a payment using Form IL-505-I, Automatic Extension Payment for Individuals, by April 15, 2015.

You can also pay online with the Illinois Department of Revenue's agency website. After April 15, 2015, you will begin to owe penalties and interest on any unpaid taxes.

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Form IL-505-I

Important Reminder!  If you are efiling an Illinois tax extension, you may need to efile a federal tax extension as well.

IL Tax Amendment

Amended Illinois state tax returns can only be filed by mail; they cannot be efiled. Learn how to prepare and file an Illinois tax amendment. 

Important Reminder!  If you are filing an Illinois tax amendment, you may need to file a federal tax amendment as well.

Past Year Forms: Tax Year 2013 Illinois Tax Forms (Print, Fill Out, and Mail)
Form IL-1040 Individual Income Tax Return

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Form IL-1040ES Estimated Income Tax Payments for Individuals
Form IL-1040V Payment Voucher for Individual Income Tax
Form IL-1040X Amended Return
Form IL-1310 Statement of Person Claiming Refund Due a Deceased Taxpayer
Form IL-2210 Computation of Penalties for Individuals
Form IL-4562 Special Depreciation
Form IL-4852 Substitute for Unobtainable Form W2
Schedule CR Credit for Tax Paid to Other States
Schedule G Voluntary Charitable Donations
Schedule ICR  Illinois Credits
Schedule M Other Additions and Subtractions
Schedule NR Nonresident & Part-Year Resident Computation

Where's My Refund? - Check Your IL State Tax Refund Status

Using efile and direct deposit is the fastest way to get your Illinois state tax refund. If you efile an Illinois state tax return, your refund will generally be processed within 1 week. If you file a paper return, it could take as long as 15 weeks to receive your state refund.

Check your Illinois tax refund status.

IL efile Error Codes

View a list of all Illinois State efile Income Tax Return Error Reject Codes.

Illinois Tax Facts

IL Income Tax:

Illinois taxes individual income at a single flat rate. For Tax Year 2010, this rate was 3%. For Tax Year 2011 and beyond, the state income tax rate is 5%.

IL Sales Tax:

The state of Illinois levies a 6.25% sales tax on most goods. The rate is 1% for certain food items, medicines, and medical items. Local governments levy additional sales taxes at various rates. Some things, like newspapers, and some large items (such as machinery used for farming or for the graphic arts) are exempt from sales tax.

More information on Illinois sales tax

IL Personal Property Tax:

In Illinois, real estate is taxed locally at different rates by several taxing districts, including municipalities, counties, townships, school districts, and special districts.

Odd Tax Fact:

To cash in on tourists, the city of Chicago taxes transportation, including taxis and trolleys.

State Tax Agency:

For more information, you can visit the website of the Illinois Department of Revenue.

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U.S. territories and protectorates:
American Samoa | Guam | Northern Mariana Islands | Puerto Rico | U.S. Virgin Islands


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