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- Click ‘Get Form’ to open the IL-1120 in the editor.
- Begin by entering your corporation's complete legal name in the designated field. If there has been a name change, ensure to check the appropriate box.
- Fill in your mailing address accurately. If this is your first return or if you have changed your address, check the corresponding box.
- Enter your federal employer identification number (FEIN) and North American Industry Classification System (NAICS) code as required.
- Proceed to calculate your income or loss by following the instructions for each line item, ensuring all necessary attachments are included as specified.
- Complete subsequent sections regarding deductions, taxes owed, and any applicable credits. Review each section carefully to ensure accuracy.
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| Versions | Form popularity | Fillable & printable |
|---|---|---|
| 2025 | 4.5 Satisfied (46 Votes) | |
| 2023 | 4.2 Satisfied (29 Votes) | |
| 2022 | 4.8 Satisfied (31 Votes) | |
| 2021 | 4.8 Satisfied (52 Votes) | |
| 2020 | 4.4 Satisfied (249 Votes) | |
| 2019 | 4.3 Satisfied (157 Votes) | |
| 2018 | 4.3 Satisfied (201 Votes) | |
| 2017 | 4.4 Satisfied (189 Votes) | |
| 2016 | 4.4 Satisfied (113 Votes) | |
| 2015 | 4 Satisfied (38 Votes) | |
| 2014 | 4.3 Satisfied (64 Votes) | |
| 2013 | 4 Satisfied (35 Votes) | |
| 2012 | 4.3 Satisfied (56 Votes) | |
| 2011 | 4.3 Satisfied (65 Votes) | |
| 1998 | 4 Satisfied (59 Votes) |
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