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Important!

If you haven’t filed the August 2020 return yet, the due date has automatically been extended to October 2; there is no need to request the extension. If you have already filed, you do not need to do anything else. We will waive late filing penalties for businesses unable to file their return by September 25.

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Estate tax forms

Warning: To protect against the possibility of others accessing your confidential information, do not complete these forms on a public workstation.

Affidavit Substantiating Decedent's State of Domicile at Death

Application for Extension of Time to File a Washington State Estate and Transfer Tax Return

Electronically file a first extension request with payment (must include electronic payment)

Confidential Tax Information Authorization (Estate Tax Information Only)

Escheat Property, Notice of

Estate and Transfer Tax Return for deaths on or after January 1, 2014, Washington

Estate Tax Return (Fill-In or Print)
- Filing Checklist
- Instructions
- Addendum # 1 - Qualified Terminable Interest Property (QTIP) or Qualified Domestic Trust (QDOT) with instructions (Fill-In or Print)
- Addendum # 2 - Property Used for Farming (farm deduction) with instructions (Fill-In or Print)
- Addendum # 3 - Qualified Family-Owned Business Interests (QFOBI) with instructions (Fill-In or Print)
- Addendum # 4 - Apportionment for Out of State Property with instructions (Fill-In or Print)

Estate Tax Tables: Tax Rates, Filing Thresholds, Exclusion Amounts, and Interest Rates