IL-1041-X Form Instructions 2025

Form IL-1041-X is an amended return used by fiduciaries to correct a previously filed Fiduciary Income and Replacement Tax Return (Form IL-1041) for tax years ending on or after December 31, 2024. This form allows taxpayers to report adjustments to income, deductions, and tax credits based on new information or changes. It is crucial for situations like correcting errors or accounting for changes in federal tax reporting that affect Illinois tax obligations. The form must be filed for any corrections to the original return, and it must include detailed explanations of the changes made. This form ensures that taxpayers pay the correct amount of tax and avoid penalties or interest related to underreporting.

How to File Form IL-1041-X?

To file Form IL-1041-X, you need to complete the form with accurate amended amounts, including your tax year information, changes in income or deductions, and any adjustments related to credits. Attach necessary schedules and documents to support the changes. If you are paying any additional taxes, include payment with Form IL-1041-X-V. This form should be mailed to the Illinois Department of Revenue, and if a refund is due, it will be processed after reviewing the corrected information. If you are not making any payments electronically, this form is required for mailed payments.

How to Complete Form IL-1041-X

Step 1: Identify Your Fiduciary

A: Enter the full legal name of your business or fiduciary entity. If the name has changed since the original filing, check the box.
B: Provide your full mailing address, including any care-of (C/O) information.
C: Indicate whether you are filing as a Trust or Estate by checking the corresponding box.
D: Check the boxes that apply to your specific situation (e.g., Electing Small Business Trust (ESBT), Bankruptcy Estate).
E: Select the type of change you are making (NLD, State change, Federal change). If it’s a federal change, specify whether it’s partial or finalized and enter the finalization date.
F: Enter your Federal Employer Identification Number (FEIN).
G: Check this box if the form is filed only to report an increased net loss on Line 29, Column B.
H: Check if you are a nonresident of Illinois and have attached Illinois Schedule NR.
I: Check if you attached Illinois Schedule 1299-D.
J: Check if you attached Form IL-4562.
K: Check if you attached Schedule M.
L: Check if you attached Schedule 80/20.
M: Check if you completed and attached Federal Form 8886.
N: Check if you are making a discharge of indebtedness adjustment on Schedule NLD or Form IL-1041, Line 28, and attach federal Form 982.
O: Check if you are making a throwback adjustment (refer to instructions).
P: Check if you are making a double throwback adjustment (refer to instructions).
Q: Check this box if you are a 52/53 week filer.
Payment: Enter the amount you are paying (if applicable) and attach your payment and Form IL-1041-X-V.

Explanation of Changes: Attach a separate sheet if necessary to explain the changes being made in this amended return.

Step 2: Figure Your Income or Loss

1: Enter the federal taxable income from federal Form 1041, Line 23.
2: Enter the federal net operating loss deduction from federal Form 1041, Line 15b. This should not be negative.
3: Enter taxable income of an ESBT, if applicable.
4: Enter the exemption claimed on federal Form 1041, Line 21.
5a/5b: Enter the Illinois income and replacement tax and surcharge deducted in arriving at Line 1.
6a/6b: Enter state, municipal, and other interest income excluded from Line 1.
7a/7b: Enter the Illinois Special Depreciation addition (attach Form IL-4562).
8a/8b: Report related-party expenses addition (attach Schedule 80/20).
9a/9b: Report distributive share of additions (attach Schedule(s) K-1-P or K-1-T).
10a/10b: Other additions (attach Schedule M for businesses).
11: Add the figures from Lines 1 through 4 and 5b through 10b to calculate your total income or loss.

Step 3: Figure Your Base Income or Loss

12: Enter the amounts from Line 11.
13a/13b: Enter the August 1, 1969, valuation limitation amount (attach Schedule F).
14a/14b: Enter payments from certain retirement plans (see instructions).
15a/15b: Enter interest income from U.S. Treasury and other exempt federal obligations.
16a/16b: Enter retirement payments to retired partners.
17a/17b: Enter the River Edge Redevelopment Zone Dividend subtraction (attach Schedule 1299-B).
18a/18b: Enter the High Impact Business Dividend subtraction (attach Schedule 1299-B).
19a/19b: Enter contributions to certain job training projects (see instructions).
20a/20b: Enter Illinois Special Depreciation subtraction (attach Form IL-4562).
21a/21b: Report related-party expenses subtraction (attach Schedule 80/20).
22a/22b: Distributive share of subtractions (attach Schedule(s) K-1-P or K-1-T).
23a/23b: Report ESBT loss amount.
24a/24b: Other subtractions (attach Schedule M).
25: Add the figures from Lines 13b through 24b to calculate your total subtractions.
26: Subtract Line 25 from Line 12 to determine base income or loss.

Step 4: Figure Your Net Income

27: For residents, enter the amount from Line 26. For nonresidents, use Schedule NR, Line 51.
28: Enter any discharge of indebtedness adjustment (attach federal Form 982).
29: Add Lines 27 and 28 to calculate adjusted base income or net loss.
30: Enter the Illinois net loss deduction (attach Schedule NLD).
31: Enter the standard exemption (residents only; nonresidents use Schedule NR, Line 54).
32: Add Lines 30 and 31.
33: Subtract Line 32 from Line 29 to calculate net income. Enter zero if negative.

Step 5: Figure Your Net Replacement Tax (Trusts Only)

34: Multiply Line 33 by 1.5% (.015) to calculate replacement tax.
35: Enter the recapture of investment credits (attach Schedule 4255).
36: Add Lines 34 and 35 for replacement tax before credits.
37: Enter the replacement tax credit for income tax paid to another state (attach Schedule CR).
38: Enter investment credits (attach Form IL-477).
39: Add Lines 37 and 38 for total credits.
40: Subtract Line 39 from Line 36 to determine net replacement tax. Enter zero if negative.

Step 6: Figure Your Net Income Tax (For Trusts and Estates)

41: Enter the amounts of net income from Line 33.
42: Calculate income tax (refer to instructions).
43: Enter the recapture of investment credits (attach Schedule 4255).
44: Add Lines 42 and 43 for income tax before credits.
45: Enter income tax credit for tax paid to another state (attach Schedule CR).
46: Enter income tax credits (attach Schedule 1299-D).
47: Add Lines 45 and 46 for total credits.
48: Subtract Line 47 from Line 44 to determine net income tax. Enter zero if negative.

Step 7: Figure Your Refund or Balance Due

49: Trusts Only: Net Replacement Tax from Line 40.
Enter the net replacement tax amount from Line 40. This is for trusts only, and it will reflect the replacement tax that was previously calculated.
50: Net Income Tax from Line 48.
Enter the net income tax amount from Line 48. This is the tax amount calculated after adjustments and credits, if applicable.
51: Compassionate Use of Medical Cannabis Program Act Surcharge.
Enter the surcharge for the Compassionate Use of Medical Cannabis Program Act, as instructed. If this is not applicable to you, leave this line blank. Refer to the instructions for the specific amount.
52: Sale of Assets by Gaming Licensee Surcharge.
Enter the surcharge related to the sale of assets by a gaming licensee, if applicable. This applies to those involved in the gaming industry. Refer to the instructions for guidance.
53: Pass-Through Withholding You Owe on Behalf of Your Members.
Enter the amount of pass-through withholding you owe for your members. This should be reported from Schedule D, Section A, Line 3. Make sure to attach Schedule D if necessary.
54: Total Net Income and Replacement Taxes, Surcharges, and Pass-Through Withholding You Owe.
Add Lines 49 through 53. This is the total amount of tax, surcharge, and withholding you owe. Enter the sum here.
55: Payments.
This section deals with any payments made towards your tax obligations.
- 55a: Credits from Previous Overpayments.
  Enter any credits you are applying from previous overpayments. This is the amount carried forward from previous years, if applicable.
- 55b: Total Payments Made Before the Date This Amended Return is Filed.
  Enter the total amount of payments made before filing the amended return. This includes any payments made as part of your original filing or estimates.
- 55c: Pass-Through Withholding Reported to You.
  Enter the amount of pass-through withholding reported to you, if applicable. Attach Schedule(s) K-1-P or K-1-T to support this entry.
- 55d: Pass-Through Entity Tax Credit Reported to You.
  Enter the amount of pass-through entity tax credit reported to you. Attach Schedule(s) K-1-P or K-1-T for this credit.
- 55e: Illinois Income Tax Withheld.
  Enter the Illinois income tax withheld, which should be reported on your W-2, W-2G, or 1099 forms. Attach these forms as necessary.
56: Total Payments.
Add Lines 55a through 55e. This is the total of all payments and credits you are applying to this return.
57: Previously Paid Penalty and Interest.
Enter the amount of any penalty and interest you have already paid. This is part of the adjustment to your account due to previous underpayment or late payments.
58: Total Amount of Overpayment (Including Any Carryforward or Refund) Before the Filing of This Return for the Year Being Amended.
Enter the total amount of overpayment from the prior return, including any carryforward or refund you were entitled to before filing this amended return.
59: Add Lines 57 and 58.
Add the amounts from Line 57 and Line 58. This is the total of previously paid penalty, interest, and overpayment.
60: Net Tax Paid.
Subtract Line 59 from Line 56. This is the amount of net tax paid after applying previous credits and overpayments.
61: Overpayment.
If Line 60 is greater than Line 54, subtract Line 54 from Line 60. This is the amount of overpayment you have made. If the result is positive, it means you are due for a refund.
62: Amount of Overpayment from Line 61 to Be Credited Forward.
Enter the amount of overpayment from Line 61 that you wish to carry forward to the next tax year. Attach a detailed statement if this carryforward is going to a different FEIN.
63: Refund.
Subtract Line 62 from Line 61. This is the amount to be refunded to you after applying any carryforward or credits. If Line 62 is greater than Line 61, this amount will be zero.
64: Tax Due with This Amended Return.
If Line 54 is greater than Line 60, subtract Line 60 from Line 54. This is the amount of tax you owe with this amended return. If the result is positive, you must make a payment. If the result is zero or negative, no additional tax is due.