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Q:  Where do I find my Department of Revenue tax registration number?

A:  The tax registration number (also called the Unified Business Identifier number) should be above your name on the mailing label of the tax return or other correspondence sent from the Department of Revenue. It is a 9-digit number. This number can also be located on your Business License received from the Business Licensing Service.
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Related questions & answers
What is a UBI number? Is it different from my DOR registration or tax registration number?
How do I register my business in Washington?
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