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Illinois Department of Revenue
Amended Composite Income
2010 IL-1023-C-X
and Replacement Tax Return
For tax years ending on or after December 31, 2010
Do not write in this box.
Indicate what tax year you are amending: Tax year beginning ____ ____ ______, ending ____ ____ ______
Write the amount you
month day
year
month
day
year
are paying.
If you are fi ling an amended return for tax years ending before December 31, 2010,
$_________________
you cannot use this form. For prior years, use the amended return form for that year.
Step 1: Identify your exempt organization
D
A
Write your complete legal business name.
Check the box that identifi es the return you fi led.
If you have a name change
only,
check this box.
Form IL-1065
Form IL-1120-ST
E
Check the applicable box for the type of change
_____________________________________________________
Name: _
being made.
B
If you have an address change, check this box and complete
State change
Federal change
the following information.
If a federal change, check one:
___________________________________________________
C/O: ____
Partial agreed
Finalized
Write the fi nalization date _______________
_______________________________________________
Mailing address:
Attach your federal fi nalization to this return.
__________________________
_______
___________
City:
State:
ZIP:
F
Check this box if any partners or shareholders
C
Write your federal employer identifi cation number (FEIN).
included are trust members.
___ ___ - ___ ___ ___ ___ ___ ___ ___
6 6 6
G
Check this box if the partners or shareholders included
Seq. code
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.
_______________ 00
_______________ 00
.
.
b
1b ___
1b ___
Total percentage of ownership for resident members.
_____________
_____________
(Write the percentage as a decimal and carry to six decimal places).
c
1c
1c
Multiply Line 1a by Line 1b.
_______________ 00
_______________ 00
2 a
2a
2a
Modifi ed base income allocable to Illinois.
_______________ 00
_______________ 00
.
.
b
2b ___
2b ___
Total percentage of ownership for nonresident members.
_____________
_____________
(Write the percentage as a decimal and carry to six decimal places).
c
2c
2c
Multiply Line 2a by Line 2b.
_______________ 00
_______________ 00
3
3
3
Add Lines 1c and 2c. This amount is your income.
_______________ 00
_______________ 00
4
4
4
Income tax. Multiply Line 3 by 3% (.03).
_______________ 00
_______________ 00
5
5
5
Recapture of investment credits (Schedule 4255).
_______________ 00
_______________ 00
6
6
6
Income tax before investment credits. Add Lines 4 and 5.
_______________ 00
_______________ 00
7
7
7
Income tax credits (Schedule 1299-A). See instructions.
_______________ 00
_______________ 00
8
8
8
Net income tax. Subtract Line 7 from Line 6.
_______________ 00
_______________ 00
*032001110*
IL-1023-C-X front (R-12/10)