Extension of time to file
An extension of time to file may be requested. However, extension requests must be made in writing prior to the assessment's due date.
Request an extension
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
Length of extension
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.
Board of Tax Appeals extensions
The Board of Tax Appeals may grant extensions separate from the Department of Revenue. The Department does not have authority to grant extensions for the Board of Tax Appeals.