Important CA State and Federal Income Tax Dates

September 15, 2012

2013 third quarter estimated tax payments due for individuals and corporations
State:
- 540-ES | Instructions
- 100-ES | Instructions
Federal:
- 1040-ES (Instructions included)

October 15, 2013

Extended due date for 2012 Personal Income Tax returns
State:
- 540/540A Booklet (Instructions included)
- 540 2EZ Booklet (Instructions included)
- 540NR Booklet (Instructions included)
Federal:
- 1040 | Instructions
- 1040A | Instructions
- 1040EZ | Instructions

Extended due date for 2012 Corporation Income Tax returns (for calendar year filers)

State:
- 100 Booklet (Instructions included)
- 100S Booklet (Instructions included)
Federal:
- 1120 | Instructions
- 1120-S | Instructions

Extended due date for 2012 Partnership and LLC Income Tax returns (for calendar year filers)

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

Federal:
- 1120 | Instructions
- 1120-S | Instructions

Extended due date for 2012 Partnership and LLC Income Tax returns (for calendar year filers).

State:

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

Federal:

1065 Partnership Return | Instructions

December 17, 2013

2013 fourth quarter estimated tax payments due for corporations
State:
- 100-ES | Instructions

January 15, 2014

2013 fourth quarter estimated tax payments due for individuals
State:
- 540-ES | Instructions
Federal:
- 1040-ES (Instructions included)

Source: http://www.taxes.ca.gov/