Illinois Department of Revenue
Form IL-941
2021
Illinois Withholding Income Tax Return
Instructions available at tax.illinois.gov
Step 2: Tell us about your business
A1 Enter the total number of Forms W-2 reporting Illinois withholding you issued for the entire year.* A1 ________________
A2 Enter the total number of Forms 1099 reporting Illinois withholding you issued for the entire year.* A2 ________________
*Only complete Lines A1 and A2 when you file your 4th quarter or final return.
B If your business has permanently stopped withholding because it has closed, or you no
longer pay Illinois wages or withhold Illinois taxes from other payments, check Box B and
enter the date you stopped withholding. This is considered your final return. Do not file future
returns, unless you resume withholding Illinois income tax. B __ __ / __ __ / 2021
Step 3: Tell us about the amount subject to withholding
1 Enter the total dollar amount subject to Illinois withholding tax this reporting period, including
payroll, compensation, and other amounts. See instructions. 1 _________________
Step 4: Tell us about the amount withheld
2 Enter the exact amount of Illinois Income Tax you actually withheld from your employees or others on the date
you paid the compensation. Only enter amounts on days you made withholding - leave the remaining “Day” lines
blank. If you withheld no Illinois Income Tax during the month, enter “0” on the corresponding “Total” line - Line 2a,
2c, or 2d (noted by “ ”).
2a First month of quarter (i.e., January for 1st quarter; April for 2nd quarter; July for 3rd quarter; and October for 4th quarter)
Day Amount Day Amount Day Amount Day Amount
1 ____________.___ 9 ____________.___ 17 ____________.___ 25 ____________.___
2 ____________.___ 10 ____________.___ 18 ____________.___ 26 ____________.___
3 ____________.___ 11 ____________.___ 19 ____________.___ 27 ____________.___
4 ____________.___ 12 ____________.___ 20 ____________.___ 28 ____________.___
5 ____________.___ 13 ____________.___ 21 ____________.___ 29 ____________.___
6 ____________.___ 14 ____________.___ 22 ____________.___ 30 ____________.___
7 ____________.___ 15 ____________.___ 23 ____________.___ 31 ____________.___
8 ____________.___ 16 ____________.___ 24 ____________.___
Total Illinois Income Tax withheld this month. (Add Section 2a, Lines 1-31.) 2a ____________.___
IL-941 Front (R-12/20)
Check this
box if your
business
name has
changed.
Check this
box if your
address
has
changed.
Check this
box if this is
your first
return.
*71012211W*
This form is required to be filed electronically. To request a waiver, complete and submit Form IL-900-EW. To file electronically, use MyTax
Illinois at mytax.illinois.gov or an IDOR-approved Tax-Prep software program.
Step 1: Provide your information
___ ___ ___ ___ ___ ___ ___ ___ ___ _ _ _ _ __
Federal employer identification number (FEIN)
Seq. number
____________________________________________________________
Business name
____________________________________________________________
C/O
____________________________________________________________
Mailing address
______________________________ _______ __________________
City State ZIP
Reporting Period
Check the quarter you are reporting.
1st (January/February/ March)
due April 30, 2021
2nd (April/May/June)
due August 2, 2021
3rd (July/August/September)
due November 1, 2021
4th
(October/November/December)
due January 31, 2022
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.
Continue on the next page.
Printed by the authority of the State of Illinois - web only, 1 copy.
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