Quarterly due dates
Quarter 1 return
- Due date: 04/30/21
- 9% penalty begins: 05/01/21
- 19% penalty begins: 06/02/21
- 29% penalty begins: 07/01/21
Quarter 2 return
- Due date: 08/2/21
- 9% penalty begins: 08/03/21
- 19% penalty begins: 09/01/21
- 29% penalty begins: 10/01/21
Quarter 3 return
- Due date: 11/01/21
- 9% penalty begins: 11/02/21
- 19% penalty begins: 12/01/21
- 29% penalty begins: 01/04/22
Quarter 4 return
- Due date: 01/31/22
- 9% penalty begins: 02/01/22
- 19% penalty begins: 03/01/22
- 29% penalty begins: 04/01/22
For updates see DOR WA Filing frequencies & due dates.
Where to File: FILE OR AMEND MY RETURN
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