Get Il-1120-st 2016-2025

The IL-1120-ST is the Small Business Corporation Replacement Tax Return for Illinois. This guide provides clear, step-by-step instructions to help users easily complete and file this form online, ensuring compliance with state tax regulations.

Follow the steps to fill out the IL-1120-ST online effectively.

1. Click ‘Get Form’ button to obtain the form and open it in the editor.
2. Enter the tax year by specifying the beginning and ending dates. Ensure accuracy in the dates to match your fiscal year, if applicable.
3. Identify your small business corporation by entering your complete legal business name. If you have changed your business name, check the appropriate box.
4. Provide your federal employer identification number (FEIN), and include the FEIN of any unitary business group member if applicable. Enter your mailing address and other required contact details.
5. Indicate specific return types by checking the appropriate boxes for first or final returns and provide additional details as needed.
6. Fill out the income or loss section, calculating ordinary income or loss from all sources, including rental activities and portfolio income. Be sure to list each type of income accurately.
7. Calculate your unmodified base income or loss by accounting for various deductions including charitable contributions and other expenses not previously deducted.
8. Complete the income calculation section by summarizing your income or loss along with any appropriate additions and subtractions according to the instructions provided on the form.
9. Determine your net income, ensuring all calculations are accurate, and attach any required schedules or forms based on the entries made.
10. Finally, review your answers, sign and date the form, then save your changes. You may choose to download, print, or share the completed form as necessary.

Begin filling out your IL-1120-ST online today to ensure a smooth and accurate tax filing process.