Search results
Form IL-1120-ST (R-12/23) is for tax years ending on or after December 31, 2023, and before December 31, 2024. For tax years ending on or after December 31, 2022 and before December 31, 2023, use the 2022 form. Using the wrong form will delay the processing of your return.
Form IL-1120 (R12/23) is for tax years ending on or after December 31, 2023, and before December 31, 2024. For tax years ending before December 31, 2023, use the 2022 form. Using the wrong form will delay the processing of your return.
Illinois Department of Revenue. 2023 Form IL-1120. *63512231W* Corporation Income and Replacement Tax Return. See “When should I file?” in the Form IL-1120 instructions for a list of due dates. If this return is not for calendar year 2023, enter your fiscal tax year here. Enter the amount you are paying. Tax year beginning 20 , ending.
Download or print the 2023 Illinois Form IL-1120 (Corporation Income and Replacement Tax Return) for FREE from the Illinois Department of Revenue.
Download or print the 2023 Illinois Form IL-1120-ST (Small Business Corporation Replacement Tax Return (Includes Schedule B)) for FREE from the Illinois Department of Revenue.
An up-to-date fillable Form IL-1120 Schedule INS is available for download through this link. Instruction Details: This 20-page document is available for download in PDF; Actual and applicable for the current year; Complete, printable, and free.
Form 1120-S. Department of the Treasury Internal Revenue Service. U.S. Income Tax Return for an S Corporation. Do not file this form unless the corporation has filed or is attaching Form 2553 to elect to be an S corporation. Go to www.irs.gov/Form1120S for instructions and the latest information. OMB No. 1545-0123.
