Anyone doing business in Seattle must have a Seattle business license tax certificate.
There are three ways to apply for a business license tax certificate:
- Online – To apply online, go to http://www.seattle.gov/licenses/get-a-business-license and click the Seattle electronic filing system (SELF).
- In person – To apply in person, visit the business licensing office on floor 42 of the Seattle Municipal Tower. Drivers can complete a business license tax certificate application, pay the fee and in most cases immediately receive your business license tax certificate.
- By mail – To apply by mail, download a Seattle business license tax certificate application. Then fill it out and mail it to the following address with payment:
City of Seattle
License and Tax Administration
700 5th Avenue, Suite 4250
P.O. Box 34214
Seattle, Washington 98124-4214