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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.
Forms & publications
Forms
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Top picks
Business license
- Business License Application (PDF)
- Business information change form (PDF)
- Confidential License Information Authorization (CLIA) (PDF)
Tax
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Warning: to protect against the possibility of others accessing your confidential information, do not complete these forms on a public workstation.
Income tax forms
The State of Washington does not have a personal or corporate Income Tax. For federal income tax forms, visit the Internal Revenue Service (IRS).