Follow the steps to complete the IL DoR Schedule 1299-C online

1. Click ‘Get Form’ button to obtain the form and open it in the editor.
2. Enter your Social Security number and your name as shown on Form IL-1040 in the designated fields. This information is critical for identifying your tax documents.
3. Start with Step 1 to figure your subtractions. Input the necessary dividend information from partnerships, S corporations, trusts, or estates. Ensure to attach Schedule(s) K-1-P or K-1-T if applicable.
4. Continue with the High Impact Business within a Foreign Trade Zone (or sub-zone) Dividend Subtraction section. Input the corporation’s name and zone, and again attach the relevant schedules.
5. Calculate total subtractions by adding the values from previous sections and enter the result on the appropriate line.
6. Proceed to Step 2, where you will work on Worksheets for any income tax credits earned. Complete the Research and Development worksheet if applicable, ensuring to enter the calculated amounts in Step 3, Column E.
7. Complete the K-12 Instructional Materials and Supplies section, ensuring you enter the qualified expenses.
8. If applicable, provide the required information for Adoption credits, detailing expenses and any previously claimed amounts.
9. In Step 3, use the figures from the previous steps to compute your income tax credit, ensuring to follow the guidelines from the Schedule 1299-C Instructions.
10. Once all sections are filled, save your changes, then download or print the completed form for submission.

Ensure your tax documents are accurate and complete by filing the IL DoR Schedule 1299-C online today.