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Contact information for businesses

File quarterly unemployment taxes

Pay quarterly unemployment taxes

  • Online
  • Mail: Employment Security Department, P.O. Box 34467, Seattle, WA 98124

Mail monthly billing statement payments to:
P.O. Box 34949, Seattle, WA 98124-1949

Mail paper tax-filing documents to:
P.O. Box 34729, Seattle, WA 98124-1729

Send certified-mail payments to:
105 14th Ave, Suite 300, Seattle, WA 98122

Get technical support for UIFastTax, UIWebTax and ICESA

Information about your tax account (employer help line)

General tax information and forms

For questions regarding a specific benefits claim, call the employer helpline at 877-504-5607.

Information about your tax rate and or penalties, call 888-836-1900, TTY 800-833-6388.


Find Employment Security's Tax Center

    Tax Center

Sign up for e-mail reminders and information

Information about the federal Work Opportunity Tax Credit

Information for new businesses

Labor statistics

Governor’s Committee on Disability Issues and Employment

Employer assistance to avoid layoffs

  • E-mail
  • 800-752-2500
  • Toll-free fax: 800-701-7754 

Assistance for employers proceding with layoffs

Report a layoff to the Dislocated Worker Unit

  • E-mail
  • 360-902-9767
  • Fax: 360-902-9662 

List job openings / find job candidates through WorkSource

Report tax cheaters

  • Online
  • 866-266-1987, 360-902-9450

Report unemployment benefits cheaters

  • Online
  • 866-266-1987, option 2
  • Fax: 360-407-3377
  • Mail: Office of Special Investigations, P.O. Box 9046, Olympia, WA 98507

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