Illinois Income Taxes and State Tax Forms

efile Illinois tax return
Illinois
"The Prairie State"

Start Federal and Illinois Tax Returns

Your Illinois Income Tax Return

Efile.com makes it easy for you to e-file your 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 efile a state tax return. This is not an efile.com policy but an IRS and state agency policy. Many taxpayers have asked how they can only prepare and file a state income tax return. The efile.com tax application lets you prepare a state tax return only, however you cannot efile the state return upon completion. Instead, you will have to download the completed state tax return as a PDF file, print it, sign it, and mail it to the respective state - the address is on the PDF file. Find more detailed instructions on how to prepare and file a state only return on efile.com.

2018 Illinois Income Tax Filing Deadlines

Deadline
Type of Filing
Description
April 15, 2019
Tax Return - efileIT*
Illinois State Income Tax Return Due Date.
April 15, 2019
Tax Extension
Illinois Automatic Extension. Details below.
October 15, 2019
Tax Return - efileIT*
Last day to efile a 2018 Illinois State Income Tax Return for tax extension filers and late efilers.
Now
Requires an accepted 2018 or previous year Illinois State Tax Return.
State Tax Returns
Select respective State Tax Return Deadlines.
Federal Tax Returns
IRS Tax Return Deadlines.

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-1040ES
Estimated Income Tax Payments for Individuals
Form IL-1040-V
Payment Voucher for Individual Income Tax
Form IL-1040X
Amended Return
Form IL-1310
Refund Due a Deceased Taxpayer
Form IL-2210
Computation of Penalties for Individuals
Form IL-4562
Special Depreciation
Form IL-4644
Gains from Sales of Employer's Securities Received from a Qualified Employee Benefit Plan
Form IL-4852
Substitute for Unobtainable Form W-2
Schedule 1299-C
Income Tax Subtractions & Credits for Individuals
Schedule 4255
Recapture of Investment Tax Credits
Schedule CR
Tax Paid to Other States Credit
Schedule F
Gains from Sales or Exchanges of Property Acquired Before August 1, 1969
Schedule G
Voluntary Charitable Donations
Schedule ICR
Illinois Credits
Schedule M
Other Additions and Subtractions
Schedule NR
Nonresident & Part-Year Resident Computation
Schedule SA
Specific Accounting Method of Computing Net Income for Individuals
Illinois State Employees Withholding Allowance Certificate
Cannot be efiled


* 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. Find out how to only prepare and file a state tax return. Only on efile.com can you prepare and efile unlimited state tax returns for one low price. Most other sites charge a per state price.

Illinois efile Error Codes

If your Illinois state return was rejected by the state and not efile.com, you will receive an error reject code. If you prepared and efiled your return on efile.com, we will provide you with an explanation of how to correct the error on your return. You may then resubmit your state return at no additional charge until it is accepted by the state. View a list of all Illinois State efile Income Tax Return Error Reject Codes.

How to File an Illinois Tax Extension

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.

Important: Do you need to prepare and e-file an IRS or federal tax extension as well?

How to File an Illinois 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.

2017 Tax Year Illinois Tax Forms

Illinois state tax forms for previous Tax Years cannot be prepared and e-filed during the current tax season. You will need to print, fill out, and mail the forms to the Illinois Department of Revenue.

Form/Schedule
Description
Individual Income Tax Return
Estimated Income Tax Payments for Individuals
Payment Voucher for Individual Income Tax
Amended Return
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
 

2016 Tax Year Illinois Tax Forms

Illinois state tax forms for previous Tax Years cannot be prepared and e-filed during the current tax season. You will need to print, fill out, and mail the forms to the Illinois Department of Revenue.
 
Form/Schedule
Description
Individual Income Tax Return
Estimated Income Tax Payments for Individuals
Payment Voucher for Individual Income Tax
Amended Return
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
Research and Development Credit Supplemental Schedule 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

Illinois Tax Facts

IL Income Taxes

Illinois taxes individual income at a single flat rate of 3.75%

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 Illinois Tax Fact

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

Illinois State Tax Agency Contacts

You can contact the Illinois Department of Revenue at 800 732-8866.

For more information on Illinois state income taxes, you can visit the website of the Illinois Department of Revenue.

See other U.S. States, Territories, and Protectorates