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Starting October 1: Some business services are now subject to retail sales tax, as required by state law, ESSB 5814. When you buy these services, vendors should add sales tax to your bill. If you sell these services, you should begin collecting retail sales tax. Learn more about Services newly subject to retail sales tax.
My DOR - How to file an Excise Tax Return
Attend a free webinar to learn how to file basic excise tax returns using our online portal, My DOR. We will demonstrate how to report for three business and occupation tax classifications (retailing, wholesaling, and service and other activities), deductions, credits, and litter tax.
If you haven’t already, please watch our Business Tax Basics video, or sign up to attend a Business Tax Basics workshop in person or online before taking the My DOR – How to file an excise tax return webinar.
If you're not able to attend a webinar but would still like to learn about filing your excise tax return in My DOR, try these resources:
If you need accommodations in order to attend a workshop, please email tpseducationoutreach@dor.wa.gov or call 360-704-5683.
2025
| Date & time | Location | Registration link |
|---|---|---|
| November 18, 2025 Wednesday 10:00 a.m. - 12:00 p.m. |
Combo webinar includes Business Tax Basics |
Register for the November 18 webinar. |
| 20 de noviembre de 2025 Jueves 10:00 a.m. a 11:15 a.m. |
Seminario web en español | Regístrese para el taller del 20 de noviembre. |
| December 17, 2025 Thursday 10:00 a.m. - 12:00 p.m. |
Combo webinar includes Business Tax Basics |
Register for the December 17 webinar. |
| 18 de diciembre de 2025 Jueves 10:00 a.m. a 11:15 a.m. |
Seminario web en español | Regístrese para el taller del 18 de diciembre. |
2026
| Date & time | Location | Registration link |
|---|---|---|
| 20 de enero de 2026 Martes 2:00 p.m. a 3:15 p.m. |
Seminario web en español | Regístrese para el taller del 20 de enero. |
| January 21, 2026 Wednesday 11:00 a.m. - 12:00 p.m. |
Webinar | Register for the January 21 webinar. |
| January 27, 2026 Tuesday 10:00 a.m. - 12:00 p.m. |
Combo webinar includes Business Tax Basics |
Register for the January 27 webinar. |
| January 29, 2026 Thursday 10:00 a.m. - 11:00 a.m. |
Webinar | Register for the January 29 webinar. |
| February 11, 2026 Wednesday 11:00 a.m. - 12:00 p.m. |
Webinar | Register for the February 11 webinar. |
| 18 de febrero de 2026 Miércoles 10:00 a.m. a 11:15 a.m. |
Seminario web en español | Regístrese para el taller del 18 de febrero. |
| February 24, 2026 Tuesday 10:00 a.m. - 12:00 p.m. |
Combo webinar includes Business Tax Basics |
Register for the February 24 webinar. |
| March 11, 2026 Wednesday 2:00 p.m. - 4:00 p.m. |
Combo webinar includes Business Tax Basics |
Register for the March 11 webinar. |
| 12 de marzo de 2026 Jueves 10:00 a.m. a 11:15 a.m. |
Seminario web en español | Regístrese para el taller del 12 de marzo. |
| March 17, 2026 Tuesday 10:00 a.m. - 11:00 a.m. |
Webinar | Register for the March 17 webinar. |
| March 18, 2026 Wednesday 2:00 p.m. - 3:00 p.m. |
Webinar | Register for the March 18 webinar. |
| March 19, 2026 Thursday 10:00 a.m. - 11:00 a.m. |
Webinar | Register for the March 19 webinar. |
| March 20, 2026 Friday 11:00 a.m. - 12:00 p.m. |
Webinar | Register for the March 20 webinar. |
| March 24, 2026 Tuesday 2:00 p.m. - 3:00 p.m. |
Webinar | Register for the March 24 webinar. |
| March 25, 2026 Wednesday 10:00 a.m. - 11:00 a.m. |
Webinar | Register for the March 25 webinar. |
| March 26, 2026 Thursday 10:00 a.m. - 12:00 p.m. |
Combo webinar includes Business Tax Basics |
Register for the March 26 webinar. |
| March 26, 2026 Thursday 2:00 p.m. - 3:00 p.m. |
Webinar | Register for the March 26 webinar. |
| March 27, 2026 Friday 10:00 a.m. - 11:00 a.m. |
Webinar | Register for the March 27 webinar. |
| March 31, 2026 Tuesday 11:00 a.m. - 12:00 p.m. |
Webinar | Register for the March 31 webinar. |
| April 1, 2026 Wednesday 2:00 p.m. - 3:00 p.m. |
Webinar | Register for the April 1 webinar. |
| April 2, 2026 Thursday 2:00 p.m. - 3:00 p.m. |
Webinar | Register for the April 2 webinar. |
| April 3, 2026 Friday 11:00 a.m. - 12:00 p.m. |
Webinar | Register for the April 3 webinar. |
| 6 de abril de 2026 Lunes 9:00 a.m. a 10:15 a.m. |
Seminario web en español | Regístrese para el taller del 6 de abril. |
| April 7, 2026 Tuesday 2:00 p.m. - 3:00 p.m. |
Webinar | Register for the April 7 webinar. |
| April 8, 2026 Wednesday 10:00 a.m. - 11:00 a.m. |
Webinar | Register for the April 8 webinar. |
| April 8, 2026 Wednesday 2:00 p.m. - 4:00 p.m. |
Combo webinar includes Business Tax Basics |
Register for the April 8 webinar. |
| April 9, 2026 Thursday 11:00 a.m. - 12:00 p.m. |
Webinar | Register for the April 9 webinar. |
| April 10, 2026 Friday 10:00 a.m. - 11:00 a.m. |
Webinar | Register for the April 10 webinar. |
| April 13, 2026 Monday 2:00 p.m. - 3:00 p.m. |
Webinar | Register for the April 13 webinar. |
| April 14, 2026 Tuesday 10:00 a.m. - 11:00 a.m. |
Webinar | Register for the April 14 webinar. |
| April 15, 2026 Wednesday 9:00 a.m. - 10:00 a.m. |
Webinar | Register for the April 15 webinar. |
| April 23, 2026 Thursday 1:00 p.m. - 3:00 p.m. |
Combo webinar includes Business Tax Basics |
Register for the April 23 webinar. |