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Get the free 1998 IL-1120-ST Inst. ---- (R-12/98) Instructions for Form IL-1120-ST. Income Tax - ...

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If you receive permission to use an alternative formula, you must attach a copy of the letter granting permission to your Form IL1120ST. Schedule B Instructions Complete Schedule B identifying any
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Read the instructions carefully before filling out the form
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Gather all the necessary information and documents needed for the form
03
Start by entering your business's name and address
04
Fill out the sections for income, deductions, and credits
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Submit the completed form to the appropriate tax authority

Who needs 1998 il-1120-st inst?

01
Businesses that operate in Illinois and are classified as C corporations or S corporations
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Businesses with a tax year ending on or after December 31, 1998
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04
Businesses that have taxable income and are subject to Illinois income tax
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