Illinois — Income Tax Credits -for corporations and fiduciaries
More about the Illinois Schedule 1299-D Tax Credit
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File Now with TurboTaxWe last updated Illinois Schedule 1299-D in January 2025 from the Illinois Department of Revenue. This form is for income earned in tax year 2025, with tax returns due in April 2026. We will update this page with a new version of the form for 2027 as soon as it is made available by the Illinois government.
Other Illinois Corporate Income Tax Forms:
In addition to information about Illinois' income tax brackets, Tax-Brackets.org provides a total of 76 Illinois income tax forms, as well as many federal income tax forms. Here's a list of some of the most commonly used Illinois tax forms:
| Form Code | Form Name |
|---|---|
| Schedule UB-NLD | Unitary Illinois Net Loss Deduction [OBSOLETE] |
| Form IL-1120 | Corporation Income and Replacement Tax Return |
| Schedule 1299-D | Income Tax Credits -for corporations and fiduciaries |
| Form IL-1065 | Partnership Replacement Tax Return (Includes Schedule B) |
| Form IL-516-B | Pass-through Prepayment [OBSOLETE] |
View all 76 Illinois Income Tax Forms
Disclaimer: While we do our best to keep Schedule 1299-D up to date and complete on Tax-Brackets.org, we cannot be held liable for errors or omissions. Is this form missing or out-of-date? Please let us know so we can fix it!
Tax Form Sources:
- Illinois Department of Revenue ( https://www2.illinois.gov/rev/Pages/default.aspx )
- Department of Revenue Income Tax Forms ( https://www2.illinois.gov/rev/forms/Pages/default.aspx )