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Use your mouse or Tab key to move through the fields. Use your mouse or space bar to enable check boxes. Illinois Department of Revenue2018 Form IL1120Corporation Income and Replacement Tax Return×63512181W×See

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How to fill out 2018 form il-1120

01

Step 1: Gather all the required information and documents such as your company's financial statements, federal tax return, and any other supporting documents.

02

Step 2: Download the 2018 form IL-1120 from the Illinois Department of Revenue website or obtain a hard copy from the Department.

03

Step 3: Carefully read the instructions provided with the form to understand the requirements and fill out the form accurately.

04

Step 4: Start with the basic information section and enter your company's name, address, federal employer identification number, and other relevant details.

05

Step 5: Move on to the income section and report all your company's income for the 2018 tax year, including taxable and non-taxable income.

06

Step 6: Deduct any allowable expenses, deductions, and credits from your company's income to calculate the taxable income.

07

Step 7: Complete the Schedule M, which is used to reconcile the difference between federal and state net income.

08

Step 8: Calculate the tax liability based on the taxable income and the Illinois corporate income tax rate.

09

Step 9: Fill out the payment voucher if you owe any tax and attach it to the completed form.

10

Step 10: Review the filled-out form and ensure all the information is accurate and complete.

11

Step 11: Sign and date the form, and retain a copy for your records.

12

Step 12: Submit the completed form IL-1120 along with any required supporting documents and payment to the Illinois Department of Revenue by the filing deadline.

Who needs 2018 form il-1120?

01

Entities that need to file the 2018 form IL-1120 include corporations, S corporations, limited liability companies (LLCs) classified as corporations for federal tax purposes, and any other entities subject to the Illinois corporate income tax.

02

Businesses that conducted business or earned income in Illinois during the 2018 tax year are generally required to file form IL-1120.

03

It is advisable to consult a tax professional or refer to the instructions provided with the form to determine whether your specific business needs to file the 2018 form IL-1120.

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What is form il-1120?

The form il-1120 is the Illinois Corporation Income Tax Return form.

Who is required to file form il-1120?

Corporations doing business in Illinois are required to file form il-1120.

How to fill out form il-1120?

Form il-1120 must be filled out with accurate financial information, including income, deductions, and credits.

What is the purpose of form il-1120?

The purpose of form il-1120 is to report and pay income tax on behalf of corporations doing business in Illinois.

What information must be reported on form il-1120?

Information such as income, deductions, credits, and tax liability must be reported on form il-1120.

What is the penalty for late filing of form il-1120?

The penalty for late filing of form il-1120 is typically a percentage of the tax due for each month the return is late, up to a maximum penalty of 25% of the tax due.

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