2012 Form IL-1120 - Illinois Department of Revenue-2025

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  1. Click ‘Get Form’ to open the 2012 Form IL-1120 in the editor.
  2. Begin by entering your legal name, Federal Employer ID Number, and address in the designated fields. Ensure that you use capital letters for clarity.
  3. Fill in all applicable circles regarding your filing status, such as 'Initial Filer' or 'Final Return'. This helps categorize your submission correctly.
  4. Proceed to the computation sections. For example, calculate your gross receipts/sales and enter them accurately. Follow the instructions provided for each line item.
  5. Complete the tax calculations by filling out lines related to franchise tax due and any applicable credits. Make sure to attach necessary schedules if required.
  6. Review all entries for accuracy before signing and dating the form at the bottom. This ensures compliance and reduces errors.

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Corporations must complete Form IL-1120. Computer generated forms from an IDOR-approved software developer are acceptable. 2024 Form IL-1120 is for tax years ending on or after December 31, 2024, and before December 31, 2025.
We grant an automatic six-month extension of time to file your return. If you receive a federal extension of more than six months, you are automatically allowed that extension for Illinois.
Important Considerations for Form 1120 Filers: Options for Extensions: Corporations may use Form 7004 to obtain an automatic extension, which gives them an extra six months after the initial due date if more time is needed to file Form 1120.
Extended filing due date 15th day of the 10th month after the close of your tax year.
Publication 102, Illinois Filing Requirements for Military Personnel, provides detailed information about Illinois Individual Income Tax filing requirements for military personnel. The objectives of Publication 102 are to explain if military personnel are Illinois residents, part-year residents, or nonresidents.

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To make your payment electronically, visit tax.illinois.gov or scan the QR code provided. You must use one of our electronic payment options if the department has notified you that you are required to make payments electronically.
On October 11, 2022, the Illinois Department of Revenue (Department) announced that it was automatically extending to November 15, 2022, from October 17, 2022, the extended due date for filing the Illinois corporate income tax return, Form IL-1120, for calendar year 2021.

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