Illinois State Taxes and Income Tax Forms

efile Illinois tax return
Illinois
"The Prairie State"

Illinois State Income Tax Return forms for Tax Year 2018 (Jan. 1 - Dec. 31, 2018) can be e-Filed in conjunction with an IRS Income Tax Return until October 15, 2019. In January 2020, you can e-File Tax Year 2019.

eFile.com makes it easy for you to e-file your IRS and Illinois State Tax Return (e.g resident, nonresident, or part-year resident returns). However, the IRS and the respective State Tax Agencies require you to e-file a Federal Income Tax Return at the same time you e-file a State Tax Return. This is not an eFile.com policy but an IRS and State Agency policy. Thus, technically you cannot e-File anywhere - not just eFile.com - an Illinois Tax Return without also e-filing the associated IRS Tax Return. But there is good news, please read on.

Detailed instructions on how you can only prepare and mail in - not eFile - an Illinois 2018 Tax Return - here via eFile.com. However, you must download/print and sign the forms and mail them to the Tax Agency.

Function
Description
Prepare only an IL State Return
with a State Only Code: FreeFed19
Where Is Your Illinois Tax Refund Money?
Step 1: Sign into your eFile.com account and check acceptance by the Tax Agency.
Step 2: Check your Illinois Tax Refund Status.
Where is Your IRS Refund?
Step 1: Sign into your eFile.com account and check acceptance by the IRS.
Step 2: Check your IRS Tax Refund Status.
Illinois Income Tax Extension
How to correct a rejected Tax Return
If your IL Tax Return was rejected by the IL Tax Agency - not eFile.com - instructions on how to correct a rejected Illinois Tax Return.

 

Start Federal and Illinois Tax Returns

2019 Illinois Income Tax Filing Deadlines by Tax Year

The majority of deadlines listed here are for Tax Year 2018. Some apply to upcoming Tax Years and some are IRS or Federal deadlines.

Deadline
Type
Description
April 15, 2019
Tax Year 2018
Income Tax Return
Prepare and e-File an IRS (Due Date April 15, 2019) and Illinois State Income Tax Return (Due Date April 15, 2019) until October 15, 2019. - eFileIT*
Expired:
April 15, 2019
2018 Income Tax Extension
October 15, 2019
Tax Year 2018
Income Tax Return after the automatic October 15, 2019 Illinois Tax Extension
Last day to e-File a 2018 Illinois State Income Tax Return for Tax Extension Filers and late eFilers. You can only e-File (to file by paper see below) Illinois Income Tax Return together with an IRS Tax Return. eFileIT*
October 15, 2019 via mail-in Forms.
Forms incl. Mailing Address are listed below.
Tax Year 2018
Income Tax Return after the April 15, 2019 Automatic Illinois Tax Extension
Deadline for taxpayers who got an automatic IL Tax Extension to file their Illinois Income Tax Return by mail-in Forms - the Forms incl. mailing addresses are listed below - is October 15, 2019. (Optionally, the eFileIT* deadline is Oct. 15, 2019). Instructions on how to only - without the IRS return - prepare and file an Illinois State Income Tax Return on eFile.com.
Tax Amendment for all Tax Years
IRS Due Dates
IRS Tax Return, Extension, Amendment Deadlines
2019, 2020, etc.
Other State Tax Return, Extension, Amendment Deadlines
Select respective State Tax Return Deadlines.
2019, 2020, etc.
IRS Federal Income Tax Return, Amendment, Extension Deadlines
April 15, 2022
2018 Illinois Income Tax Return Refund.
IRS Tax Return Refund Claim Deadline
The last day to file - you will not face late filing penalties - and claim your 2018 Illinois Income Tax Return Refund. This deadline does not apply if you owe 2018 Income Taxes.

E-File These 2018 Illinois State Tax Forms

Prepare and efile these state forms for 2018 in conjunction with your federal and state income tax return. As you proceed through the tax interview on efile.com, the application will select the correct state forms for you. You can also select tax forms individually. All these forms will then be e-filed by you to the state tax agency. Instructions on how to only prepare a state income tax return.

Form/Schedule
Description
eFileIT Now*
Form IL-1040
Individual Income Tax Return
Form IL-1310
Refund Due a Deceased Taxpayer
Schedule ICR
Illinois Credits
Schedule M
Other Additions and Subtractions
Schedule NR
Nonresident & Part-Year Resident Computation
Extension Payment Voucher Form. Complete and submit to the IL Department of Revenue - address is on the form - with your payment.
Cannot be e-Filed. Mail-in only.
Determines your paycheck IL Tax Withholding amount per employer.
Step 1: Complete and submit to your employer(s).
Step 2: Estimate, Calculate your IRS Tax Withholding now.
Not filed with the State. Submit to Employer only.

* Due to IRS and State Tax Agency tax data sharing and validation requirements, you can only e-file a State Income Tax Return while also e-filing a Federal Income Tax Return. This is not an eFile.com created policy, but all online tax web sites have to adhere to this IRS/state issued tax data sharing policy. You can however prepare all 44 State Income Tax Returns on eFile.com if you have already e-Filed or filed your IRS return. Instructions on how you can ONLY prepare and file State Income Tax Return(s). Only on eFile.com can you prepare, file or e-file unlimited State Tax Returns for one low price and not pay for each State return like you would do on H&R Block® vs. TurboTax®. Dare to Compare Now.

Automatic Illinois State Tax Extension

For Tax Year 2018 you can e-File an IRS Tax Extension by April 15, 2019 for free on eFile.com (instructions on whether you should consider a Tax Extension or not). 

If you are certain that you cannot file your Illinois return by the deadline, you do not need to file for an extension. You will automatically receive a 6-month extension of time to file your return (not to pay). The extended tax return due date is October 15, 2019. If you expect to owe income taxes, you should submit your payment with payment voucher Form IL-505-I, Automatic Extension Payment for Individuals, by April 15, 2019. If you efiled your return and are making a payment by check or money order, you must complete a Form IL-505-I on eFile.com. If you are making a payment by credit card, a Form IL-505-I is not needed. If you are making an automatic extension payment, you also must use Form IL-505-I unless it is made electronically. Use eFile.com and prepare an Illinois tax return to find out what your Illinois state income tax payment will be.

If you owe Illinois and/or IRS income taxes and don't pay them by Tax Day, you will be charged Illinois and IRS late tax payment penalties. Calculate and estimate IRS late payment penalties.

Instructions on how to eFile an IRS tax extension for free on eFile.com by April 15, 2019.

The extended IRS/Illinois eFile deadline is Oct. 15, 2019 - eFileIT* now. If you plan to file or mail-in an Illinois tax return on paper - the Forms and Mailing Address are below - your due date is Oct. 15, 2019. 

2018 Tax Year Illinois Income Tax Forms

Illinois State Income Tax Forms for Tax Year 2018 (Jan. 1 - Dec. 31, 2018) can be e-Filed in conjunction with a IRS Income Tax Return until October 15, 2019. Details on how to only prepare and print an Illinois 2018 Tax Return.  The IL Tax Forms and Mailing Address are below - click for the IRS Federal Income Tax Forms for Tax Year 2018.

Form/Schedule
Description
Individual Income Tax Return
Estimated Income Tax Payments for Individuals
Payment Voucher for Individual Income Tax
Refund Due a Deceased Taxpayer
Computation of Penalties for Individuals
Special Depreciation
Gains from Sales of Employer's Securities Received from a Qualified Employee Benefit Plan
Substitute for Unobtainable Form W-2
Income Tax Subtractions & Credits for Individuals
Recapture of Investment Tax Credits
Tax Paid to Other States Credit
Gains from Sales or Exchanges of Property Acquired Before August 1, 1969
Voluntary Charitable Donations
Illinois Credits
Other Additions and Subtractions
Nonresident & Part-Year Resident Computation
Tax Amendment

2017 Tax Year Illinois Tax Forms

Illinois state income tax forms for Tax Year 2017 (Jan. 1 - Dec. 31, 2017)  can no longer be prepared and e-filed. Complete the respective Form(s) below, sign, and mail them to the Illinois Department of Revenue. In addition to filing Illinois Forms you might also have to file the 2017 IRS Tax Return Forms.

Form/Schedule
Description
Individual Income Tax Return
Estimated Income Tax Payments for Individuals
Payment Voucher for Individual Income Tax
Refund Due a Deceased Taxpayer
Computation of Penalties for Individuals
Special Depreciation
Gains from Sales of Employer's Securities Received from a Qualified Employee Benefit Plan
Substitute for Unobtainable Form W-2
Income Tax Subtractions & Credits for Individuals
Recapture of Investment Tax Credits
Tax Paid to Other States Credit
Gains from Sales or Exchanges of Property Acquired Before August 1, 1969
Voluntary Charitable Donations
Illinois Credits
Other Additions and Subtractions
Nonresident & Part-Year Resident Computation
Specific Accounting Method of Computing Net Income for Individuals
Tax Amendment

Illinois Tax Facts, Information

Illinois Tax Information and Contacts

IL Tax Type
Description
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.
Illinois Tax Fact
To cash in on tourists, the city of Chicago taxes transportation, including taxis and trolleys.
Illinois Tax Payment Options
Illinois State Tax Agency Contacts
For Mailing Addresses and other contact information contact the IL Dep. of Taxation

 

Other U.S. States, Territories, and Protectorates.