ILLINOIS DEPARTMENT OF REVENUE 

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IDR-1-DIS (N-08/23)          Printed by authority of State of Illinois, web only  –one copy. 
 

                                                            *61612231V*

       Illinois Department of Revenue                       Income Tax Subtractions                                                 
                                                            and Credits (for individuals)
       2023 Schedule 1299-C                                                                                                         
       Attach to your Form IL-1040.            For tax years ending on or after December 31, 2023.                                             IL Attachment No. 3

________________________________________________________ _____ _____ _____ –             _____ _____  –  _____ _____ _____ _____ 
Your name as shown on Form IL-1040                                       Your Social Security number

Read this information before completing this form:
Refer to Schedule 1299-I, Income Tax Credits Information and Worksheets, and Schedule 1299-C Instructions for information on how to complete 
this schedule.TENTATIVEAll figures should berounded to whole dollars.                                                            FINAL
If you are carrying forward credits from a previous year, you must refer to your 2022 Schedule 1299-C, Step 3 to determine the amount of 
available credit carryforward that you may use on this 2023 Schedule 1299-C. 
If you have more subtractions or credits than lines available, attach a separate schedule in the same format with all the required information. 
Complete Step 3, Line 43 on this schedule only. 
NOTE: If you do not provide the necessary information or attempt to claim a subtraction or credit which does not exist, you may receive 
correspondence from the Department, your subtraction or credit may be disallowed, and the processing of your return may be delayed. 

Step 1:  Figure your subtractions
 River Edge Redevelopment Zone Dividend Subtraction
                                 A                                           B                                                                 C 
                  Corporation’s name                                        Name of zone                                                 Dividend amount
  1  a                                                                                                                           a  
  b                                                                                                                              b  
     c                                                                                                                           c  
2    Enter any distributive share of River Edge Redevelopment Zone Dividend Subtraction from partnerships, 
     S corporations, trusts, or estates. Attach Schedule(s) K-1-P or K-1-T.                                                      2  
  3   Add Step 1, Column C, Lines 1a through 1c and Line 2, and enter the total here.                                            3  

 High Impact Business within a Foreign Trade Zone (or sub-zone) Dividend Subtraction 
                                 A                                           B                                                                 C 
                  Corporation’s name                                        Name of zone                                                 Dividend amount
4   a                                                                                                                            a
  b                                                                                                                              b 
    c                                                                                                                            c  
  5  Enter any distributive share of High Impact Business within a Foreign  Trade Zone (or sub-zone) Dividend 
     Subtraction from partnerships,  S corporations, trusts, or estates. 
     Attach Schedule(s) K-1-P or K-1-T.                                                                                          5 
  6  Add Step 1, Column C, Lines 4a through 4c and Line 5, and enter the total here.                                             6  
  7  Add Step 1, Lines 3 and 6. Enter your total dividend subtraction here and on Schedule M, Line 24.                           7  

                                         This form is authorized as outlined under the Illinois Income Tax Act.  Disclosure of 
                                         this information is required.  Failure to provide information could result in a penalty.

       Schedule 1299-C (R-12/23)               Printed by authority of the state of Illinois. Electronic only, one copy.                       Page 1 of 3

                                              *61612232V*

Step 2:    Worksheets (Complete this step only if you earned any of these income tax credits during your current 
tax year)
  Research and Development

    Follow the instructions on this worksheet to calculate the Research and Development credit amount to enter in Step 3, Column E. 
                                                                                               A                                 B
                                                                                       Base period avg. expenses              This year’s expenses
 8  Enter the amounts from Schedule 1299-I, Line 6 of the Research and 
     Development Worksheet.                                                             8                               8 
  9  Subtract Line 8, Column A from Line 8, Column B. If negative, enter zero.                                          9 
       TENTATIVE FINAL
10  Multiply Line 9 by 6.5% (.065).  
    Enter the result here  and in Step 3, Column E on the line with “5” in Column A and 
    Credit Code 5340 in Column B.                                                                                       10 
    K-12 Instructional Materials and Supplies
     Follow the instructions on this worksheet to  calculate the K-12 Instructional Materials and Supplies credit amount to enter in Step 3, 
     Column E, if you were a teacher, instructor, counselor, principal, or aide that worked 900 or more hours in a K-12 school in Illinois.
                                                                                     A           B
                                                                 Primary taxpayer                Spouse
11  a  Professional Educator License number, if applicable. 
    b  School name (Illinois only).   
    c  Total qualified expenses paid in 2023. 
    d  Enter the lesser of Line 11c or $500. 
12  Add Line 11d, Column A, and Line 11d, Column B. 
    Enter the result here and in Step 3, Column E on the line 
    with “5” in Column A and Credit Code 5740 in Column B.                                                              12

  Adoption 
    Follow the instructions on this worksheet to  calculate the Adoption credit amount to enter in Step 3, Column E.

Part 1 - Adopted Child Information   
                                                                 Identifying                     Birth                     IL    Final 
         Child’s Name (first, last)                              Number                          Date                   Resident in 2023
 13                                                                                                        /            
                                                                                               Month   Year  
14                                                                                                         /            
                                                                                               Month   Year
15                                                                                                         /            
                                                                                               Month    Year

Part 2 - Figure your credit                         Child 1                          Child 2     Child 3
                                                    (Line 13)                        (Line 14)   (Line 15)
16   a Maximum credit allowed
         per child (see instructions). 
      b IL Adoption credit claimed
        previously for this child. 
      c Subtract Line b from Line a. 
      dQualified adoption expenses
        (see instructions). 
      e Enter the lesser of Line c or Line d. 
      f Total amount of qualified adoption expenses from Line e. 
       Ig llinois residents: Enter 1.0.
       Nonresidents and part-year residents: Enter the decimal from Schedule NR, Line 48.                    .         
     h Multiply Line f by Line g. Enter the result here and in Step 3, Column E 
            on the line with “5” in Column A and Credit Code 5780 in Column B.                                          16 

        Page 2 of 3                                                                                                     Schedule 1299-C (R-12/23)

                                                            *61612233V*

Step 3:  Figure your Income Tax Credit (Complete Step 2 first, if applicable) See Schedule 1299-C Instructions for how to complete this Step. 
17  Enter your income tax from Form IL-1040, Line 14.                                                       17  _____________
18  Add the credit amounts from Form IL-1040, Lines 15 and 16, and enter here.                              18  _____________
                           TENTATIVE FINAL
19  Subtract Line 18 from Line 17.  If the amount is zero or negative, enter zero.                          19  _____________
        A         B          C             D                  E                      F               G      H                              I             J
    Years Left  Credit IL Tax Year       Identifying Number Credit Earned          Distributive      Total  Calculation                    Credit        Credit
     to Carry Code  Credit Earned                           or Carried             Share or Transfer Credit                                Applied       Carryforward
20   Enter the amount from Line 19 here.                                                                    20  _____________
21  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
22  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
23  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
24  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
25  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
26  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
27  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
28  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
29  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
30  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
31  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
32  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
33  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
34  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
35  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
36  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
37  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
38  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
39  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
40  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
41  ______ ______  _______  ________________________  _____________  _____________  _____________ _____________  _____________  _____________ 
42   Add the amounts in Column I and enter the total here.                                                                              42 _____________ 
43  Follow the Schedule 1299-C Instructions to determine the amount of credit you may claim this year. Enter the amount here and on your
    Form IL-1040, Line 17.                                                                                                                         43

     Schedule 1299-C (R-12/23)                                                                                                                           Page 3 of 3