An extension of time to file may be requested. However, extension requests must be made in writing prior to the assessment's due date.
Washington State Department of Revenue
Administrative Review and Hearings Division
PO Box 47460
Olympia, WA 98504-7460
If you have questions, please call (360) 534-1335
Extensions are granted when the taxpayer requires more time to prepare. An initial extension may be granted for up to 30 days.
Upon request, the Administrative Review and Hearings Division may grant an additional extension of two weeks.
The Department does not have authority to grant extensions to file at the Board of Tax Appeals.