Tax Power of Attorney Form | Washington

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Updated on May 11th, 2023

A Washington tax power of attorney form is provided by the Department of Revenue to authorize a representative to handle an individual’s tax filing with the State of Washington. The person selected should be a qualified individual like a tax attorney or a certified public accountant (CPA) as any mistakes will be the principal’s liability. The documents will usually be attached to the taxpayer’s filings, but may be sent to the following departments:

  • Department of Revenue – Taxpayer Services PO Box 47478 Olympia, WA 98504-7478
  • Employment Security Department – PO Box 9046 Olympia, WA 98507-9046
  • Department of Labor and Industries – PO Box 44140 Olympia, WA 98504-4140
Signing Requirements – Taxpayer only.