<p>To get a Seattle business license tax certificate, you are not required to have a state or federal business identification number. But if you already have any of the following numbers, please provide them.</p>
<ul>
<li>Washington State Unified Business Identifier (UBI)</li>
<li>Washington state contractor number</li>
<li>Federal Employer Identification Number (FEIN)</li>
<li>Seattle Vendor ID Number</li>
</ul>