Illinois Tax Forms 2018
Printable State IL-1040 Form and IL-1040 Instructions

Illinois 2018 IL-1040 Form and Instructions
Free printable 2018 Illinois IL-1040 Form and 2018 Illinois IL-1040 Instructions booklet in PDF format to print, prepare, and mail your 2019 Illinois state income tax return.

Printable Illinois (IL) state income tax form IL-1040 must be postmarked by April 15, 2019 in order to avoid penalties and late fees. Printable Illinois state tax forms for the current tax year will be based on income earned between January 1, 2018 through December 31, 2018. The Illinois income tax rate for 2018 is a flat tax rate of 4.95%. This state tax rate can be found inside the IL-1040 tax form and instructions booklet PDF.

Preparation of your Illinois income tax forms begins with the completion of your federal income tax forms. Some of the Illinois state income tax forms require information from your federal income tax return, for example. If you have not done so already, please begin with your federal 1040 using the links above or on the left side navigation. Remember that federal tax forms 1040EZ and 1040A have been discontinued for the 2018 - 2019 filing season.

2018 Illinois IL-1040 Form and Instructions

IL-1040 Form
IL-1040 Instructions
IL-1040-V Payment Voucher

Frequently Required Illinois Tax Forms, Schedules, Instructions:
IL-1040-ES - 2019 Illinois Estimated Tax Payment
IL-1040-X Form - Illinois Amended Income Tax Return
IL-1040-X Instructions - Illinois Amended Tax Return
IL-1040-X Payment Voucher - Illinois Amended Tax Return
IL-505-I - IL 1040 Automatic Extension Payment
IL-2210 - IL 1040 Computation of Penalties
IL-2210 Instructions - Computation of Penalties
Schedule 1299-C - Income Tax Subtractions & Credits
Schedule 1299-C Instructions - Income Tax Subtractions & Credits
Schedule CR - Credit for Tax Paid to Other States
Schedule CR Instructions - Credit for Tax Paid to Other States
Schedule G - Voluntary Charitable Donations
Schedule G Instructions - Voluntary Charitable Donations
Schedule ICR - Illinois Credits
Schedule ICR Instructions - Illinois Credits
Schedule M - Other Additions and Subtractions
Schedule M Instructions - Other Additions and Subtractions
Schedule NR - Nonresident and Part-Year Computation
Schedule NR Instructions - Nonresident and Part-Year Computation
ST-44 - Illinois Use Tax Return
ST-44 Instructions - Illinois Use Tax Return
RC-44 - Illinois Cigarette Use Tax Return
RC-44 Instructions - Illinois Cigarette Use Tax Return

List of all printable IL state income tax forms.

Click any Illinois state income tax form title above to download, view, print, and save the PDF file. The PDF file format allows you to safely print, prepare, and mail in your 2018 Illinois state tax forms.

The Illinois Department of Revenue will expect your 2018 income tax forms to be printed on high quality printers. Today's laser, bubble-jet, or ink-jet printers are generally acceptable. Color printing is not required, however, we recommend that you read the first few pages of the Illinois IL-1040 instructions booklet for updates regarding the printing of your 2018 Illinois state tax forms.

Illinois State Income Tax Refund Status

To check your 2018 IL-1040 income tax refund status online, visit the Illinois Department of Revenue website and use their Where's My Refund service. Illinois Department of Revenue refund processing time is stated as within three weeks for an electronically filed return and as long as 15 weeks for a mailed in paper return.

To check the status of your IL income tax refund for 2018 you will need the following information:

  • Name(s)
  • Address
  • Social Security Number
  • Adjusted Gross Income (Line 1)

The requested information must match what was submitted on your 2018 IL-1040 state income tax form. To look up prior year refunds, you will need to contact the Illinois Department of Revenue service center by phone or mail.

To contact the Illinois Department of Revenue service center by phone or email, use the check your refund status link above. Alternatively, view or print the 2018 IL-1040 instructions to obtain the proper phone number and mailing address.

Last updated: January 28, 2019