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Return Due Dates & Extensions

Extension Requests 

If you would like Pacific Northwest tax service can prepare and submit an extension request for you, complete and submit the extension request form that applies to your situation on Extensions page of our website.  

IMPORTANT: 

  • We process extensions ONLY for clients who properly and timely complete the appropriate Extension Request Form.  We do not accept nor process extension requests made by phone, oral request, email or another method.
  • An extension of time to file is NOT an extension of time to pay taxes owed.  Taxes owed for the final federal, state and local returns must all be paid by the original due date of the return. 

Tax Return Due Dates & Extension Deadlines

In most years, the filing deadline to submit Individual 1040 returns is April 15.  In years where April 15 falls on a weekend, the filing deadline is pushed to April 17 or 18.  The filing deadline will never fall on April 16, because April 16, Emancipation Day, is honored as a federal holiday in Washington, D.C. 

Business, nonprofit organizations estates and trusts have different filing deadlines as shown next.

Type of Return

Normal Due Date

Due Date for Returns with Timely Filed Extensions

Extension Form to File

1040 Individual

April 15

October 15

4868

1041 Fiduciary Estates & Trusts
(Calendar Year)

April 15

September 30

7004

1041 Fiduciary
(Fiscal Year)

15th day of the 4th month following the close of the estate's tax year.

30th day of the 5th month following the end of the estate's tax year.

7004

1065 Partnership

March 15

September 15

7004

1120S Corporation

March 15

September 15

7004

1120 Corporation
(Calendar year)

April 15

October 15

7004

990 Nonprofit Organization
(Calendar year)

May 15

November 15

8868

706 Estate & Generation-Skipping Transfer Tax

9 months after the date of death

6 months for timely filed extensions.  Late extensions may be accepted with sufficient cause. 

4768

Oregon OR-706 Estate or Inheritance Tax

12 months after the date of death

6 months for timely filed extensions. Additional extensions of 1-14 years can be requested. 

OR-706-EXT

1099s and W2s

January 31

Not generally allowed, except for catastrophic events

8809