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Apply for an Employer Identification Number (EIN) Online - IRS
Step 1: Determine Your Eligibility. You may apply for an EIN online if your principal business is located in the United States or U.S. Territories.
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Sole proprietorship - Wikipedia
Registration of a business name for a sole proprietor is generally uncomplicated unless it involves the selection of a name that is fictitious, or “assumed”.
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Register trade names | Washington Department of Revenue
You must register a trade name, or “doing business as” name, per RCW 19.80.10 for: A Sole Proprietor or Partnership using a name other than the full legal ...
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