Washington Tax Power of Attorney Form

A Washington Tax Power of Attorney informs the Washington State Department of Revenue of the authorized permissions to a designated attorney or accountant. The granted controls allow the assigned agent to make decisions, communicate, and submit tax documents on behalf of their client.

Last updated October 1st, 2024

Laws

Statutes – Uniform Power of Attorney Act (R.C.W. § 11-125-010 – § 11-125-903)

Definition – § 11-125-020

Signing Requirements – The issuing declarant must sign the form, and it does not require a witnessing party for verification.

How to File

Complete the filing with the necessary pertinent information such as the associated name of taxpayer or business, address, and account ID or UBI number. Provide necessary signatures and either submit by mail, email, or fax to the following address or number:

By Mail:
Department of Revenue
Taxpayer Account Administration – ICAP
PO Box 47476
Olympia, WA 98504-7476

By email:
[email protected]

By Fax:
(360) 705-6175