Confidential tax information may only be disclosed with written permission from the taxpayer or other statutory authority.
Requests for confidential records should be made by using the
Confidential
Tax Information Authorization form (pdf) or by writing a letter. You may mail or
fax your request to:
Department of Revenue
Taxpayer Services
PO Box 47478
Olympia, WA 98504-7478
Fax: (360) 705-6655