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Get the free Form IL-1120-ST-X Instructions - Illinois.gov

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Illinois Department of RevenueAmended Small Business Corporation Replacement Tax Return2017 IL1120STXFor tax years ending on or after December 31, 2017, Indicate what tax year you are amending: Tax
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Start by gathering all the necessary information and documents required to fill out form IL-1120-ST-X instructions.
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Carefully read the instructions and understand the requirements for each section of the form.
03
Fill in the basic details such as the name of the taxpayer, employer identification number (EIN), and fiscal year.
04
Provide information about the organization's address, including the street, city, state, and ZIP code.
05
Specify the accounting method used by the organization.
06
Complete Schedule A to report all the income and deductions of the organization.
07
Fill out Schedule B to report any adjustments to the federal taxable income.
08
Complete Schedule C to report any non-business income, such as interest, dividends, or rental income.
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Provide details of any tax credits the organization is entitled to claim on Schedule D.
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Review the form for accuracy and completeness before submitting it to the appropriate tax authorities.

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Form IL-1120-ST-X instructions are needed by corporations or organizations that are required to file Illinois form IL-1120-ST-X. This form is specifically designed for small businesses or S corporations that have filed a federal return on Form 1120S and need to report adjustments or modifications for Illinois purposes.
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Form IL-1120-ST-X is a supplemental form used by corporations in Illinois to amend their previously filed IL-1120-ST tax return.
Corporations that need to amend their Illinois S corporation tax returns, specifically those that originally filed the IL-1120-ST form, are required to file Form IL-1120-ST-X.
To fill out Form IL-1120-ST-X, provide the correct information in the specified sections, including details from the original return, any corrections, and required documentation that supports the changes.
The purpose of Form IL-1120-ST-X is to allow corporations to amend previous Illinois S corporation tax returns to correct errors or make changes to the reported income or deductions.
Form IL-1120-ST-X requires reporting of the original amounts, the corrected amounts, and an explanation of the changes made. Additional financial details relevant to the amendments may also be required.
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