Tax Calendar

2016

March

Tuesday, March 15

C-corporations or S-corporations that use the calendar year as the fiscal year.
If your corporation operates on its own fiscal year, then the filing date is the 15th day of the 3rdmonth after that fiscal year end.

California State
100 Booklet (Instructions included)
100S Booklet (Instructions included) 

Federal
1120 | Instructions
1120-S | Instructions


Tuesday, March 31

Last day for employees’ W-2 and Form 1099 if you are filing electronically.


April

Monday, April 18

Deadline for filing 2015 personal income taxes, not April 16, 2016 as their is a holiday observed in Washington, D.C. - Emancipation Day on April 15, 2016.

California State
540 Booklet (Instructions included)
540 2EZ Booklet (Instructions included)
540NR Booklet (Instructions included)

Federal
1040 | Instructions
1040A | Instructions
1040EZ | Instructions


2015 Partnership and LLC Income Tax returns due and tax due (for calendar year filers).

California State

565 Partnership Booklet (Instructions included)
568 Limited Liability Company Tax Booklet (Instructions included) 

Federal

1065 Partnership Return | Instructions


Deadline for first estimated tax payment for 2016.

California State

540-ES | Instructions
100-ES | Instructions

Federal

1040-ES (Instructions included)


June

Wednesday, June 15

Deadline for second estimated tax payment for 2016.

California State
540-ES | Instructions
100-ES | Instructions <
3536 Estimated Fee for LLCs (Instructions Included)

Federal

1040-ES (Instructions included)


September

Thursday, September 15

For those partnerships filing Form 1065 who filed a five-month return extension, this is the final day for those tax returns.

Deadline for third estimated tax payment for 2016.

California State
540-ES | Instructions
100-ES | Instructions

Federal
1040-ES (Instructions included)


October

Monday, October 17

Extended due date for 2015 personal income tax returns.

California State
540 Booklet (Instructions included)
540 2EZ Booklet (Instructions included)
540NR Booklet (Instructions included)

Federal
1040 | Instructions
1040A | Instructions
1040EZ | Instructions


For those corporations who filed a six-month extension in April, using form 1120 or 1120S, this if the final day to file a tax return.

California State
100 Booklet (Instructions included)

100S Booklet (Instructions included) 

Federal
1120 | Instructions
1120-S | Instructions


Extended due date for 2015 Partnership and LLC income tax returns (for calendar year filers)

California State
565 Partnership Booklet (Instructions included)
568 Limited Liability Company Tax Booklet (Instructions Included)

Federal
1065 Partnership Return | Instructions


December

Thursday, December 15

Deadline for fourth estimated tax payments.

California State
540-ES | Instructions

Federal
1040-ES (Instructions included)