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Illinois Department of Revenue
Do not write in this box.
Amended Composite Income
2008 IL-1023-C-X
and Replacement Tax Return
For tax years ending on or after December 31, 2008
Indicate what tax year you are amending: Tax year beginning ___/___/______, ending ___/___/ ______
Write the amount you
are paying.
If you are fi ling an amended return for tax years ending before December 31, 2008,
$_________________
you can not use this form. For prior years, use the amended return form for that year.
B
Check the box that identifi es the return you fi led.
Step 1: Provide the following information
Form IL-1065
Form IL-1120-ST
A
Write your partnership or subchapter S corporation name
C
and mailing address.
Write your federal employer identifi cation number (FEIN).
6 6 6
If you have a change, check this box.
___ ___ - ___ ___ ___ ___ ___ ___ ___
D
Check the applicable box for the type of change being made.
____________________________________________________
Name
State change
Federal change:
____________________________________________________
If a federal change, check one:
Partial agreed
Finalized
C/O
If fi nalized, write the fi nalization date: ____/____/______
____________________________________________________
Month
Day
Year
Mailing address
E
Check this box if you are fi ling a “corrected” return.
____________________________________________________
F
Check this box if any partners or shareholders included are trust
City
State
Zip
members.
G
Check this box if the partners or shareholders included are
individuals and/or estate members only.
Step 2: Explain the changes on this return
A
B
Step 3: Figure your income and net income tax
As most recently
reported or adjusted
Corrected amount
1 a
1a
1a
Modifi ed base income of the partnership or subchapter S corporation.
____________|____
____________|____
b
1b
1b
Total percentage of ownership for resident members.
_______________%
_______________%
c
1c
1c
Multiply Line 1a by Line 1b.
____________|____
____________|____
2 a
2a
2a
Modifi ed base income allocable to Illinois.
____________|____
____________|____
b
2b
2b
Total percentage of ownership for nonresident members.
_______________%
_______________%
c
2c
2c
Multiply Line 2a by Line 2b.
____________|____
____________|____
3
3
3
Add Lines 1c and 2c. This amount is your income.
____________|____
____________|____
4
Net income tax. Multiply Line 3 by 3% (.03).
4
4
If negative, write “0.”
____________|____
____________|____
Step 4: Figure your net replacement tax
(Complete only if this return includes any trust members.)
5
5
5
Income included in Line 3 that is subject to replacement tax.
____________|____
____________|____
6
Net replacement tax. Multiply Line 5 by 1.5% (.015).
6
6
If negative, write “0.”
____________|____
____________|____
IL-1023-C-X front (R-12/08)