Quarterly due dates
Quarter 1, 2023 return
- Due date: 04/30/23
- 9% penalty begins: 05/02/23
- 19% penalty begins: 06/01/23
- 29% penalty begins: 07/01/23
Quarter 2, 2023 return
- Due date: 07/31/23
- 9% penalty begins after: 08/01/23
- 19% penalty begins after: 09/01/23
- 29% penalty begins after: 10/01/23
Quarter 3, 2023 return
- Due date: 10/31/23
- 9% penalty begins: 11/01/23
- 19% penalty begins: 12/01/23
- 29% penalty begins: 01/03/24
Quarter 4, 2023 return
- Due date: 01/31/24
- 9% penalty begins: 02/01/24
- 19% penalty begins: 03/01/24
- 29% penalty begins: 04/02/24
For updates see DOR WA Filing frequencies & due dates.
Where to File: FILE OR AMEND MY RETURN
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