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Return and Payment Due Dates
Tax Type Form Due
Commercial Activity
Tax
CAT 12 - Annual Due May 10
CAT Q - Quarterly Due May 10 - 1st Quarter
Due August 10 - 2nd Quarter
Due November 10 - 3rd Quarter
Due February 10 - 4th Quarter
Financial Institutions
Tax
FIT ES 1st Est. Payment: 1/31
2nd Est. Payment: 3/31
3rd Est. Payment: 5/31
FIT10 - Annual Due 10/15
Individual Income IT 1040 - Annual
SD 100 - Annual
IT 1041 - Annual
IT 4708 - Annual
2019: 7/15/20
IT 1140 - Annual 15th day of the fourth month following the close of the entity's tax year.
If that date falls between 04/15/20 & 06/15/20, it is extended to 07/15/20.
IT 1040ES
SD 100ES
IT 1041 UPC
IT 4708 UPCS 

Calendar Year Filers
1st Est. Payment 2020: 7/15/2020
2nd Est. Payment 2020: 7/15/2020
3rd Est. Payment 2020: 9/15/2020
4th Est. Payment 2020:1/15/2021
 
IT 1140 UPC 
Calendar Year Filers

1st Est. Payment 2020: 7/15/2020
2nd Est. Payment 2020: 7/15/2020
3rd Est. Payment 2020: 9/15/2020
4th Est. Payment 2020: 1/15/2021

Municipal Net Profit MNP ES 
Quarterly

First Qtr: 15th day of fourth (4th) taxable month
Second Qtr: 15th day of the sixth (6th) taxable month
Third Qtr: 15th day of ninth (9th) taxable month
Fourth Qtr: 15th day of twelfth (12th) taxable month

If due date falls between April 15, 2020 and June 15, 2020,
the deadline has been extended to July 15, 2020.

MNP 10 
Annual

Original Deadline: 15th day of the fourth (4th) month following
the end of the taxable year.

Deadline with the Granted Extension: 15th day of the tenth (10th) month 
following the end of the taxable year.

If due date for the 2019 MNP10 falls between April 15, 2020 and June 15
2020, the deadline has been extended to July 15, 2020.

Employer Withholding IT 501
SD 101 

Quarterly
Last day of the following month
IT 501
SD 101 

Monthly
15th day of the following month
IT 501
Partial Week
See Attachment
IT 941
SD 141 

Annually
Jan 31
IT 3
Annually
Jan 31
Sales UST Monthly
UST Semi - Annual
23rd day of the following month
Jan. 1 - June 30 is due July 23
Jan. 1 - Dec. 31 is due Jan 23
UUT 1 Monthly
UUT 1 Quarterly
23rd day of the following month
23rd day of the following month following the close of
the reporting period.

Note: All dates above are the date due unless it falls on a weekend or holiday. If so, the due date is the next business day. For example: January 2020 Sales Tax, which is normally due on february 23rd is due February 24th, 2020 since the 23rd falls on a Sunday.