https://www.legalzoom.com/articles/what-is-an-ein-and-does-your-business-need-one
What Is an EIN and Does Your Business Need One?
Most new businesses need a federal employer identification number (EIN) from the IRS. Without an EIN, you can't run payroll, pay taxes, or even open a business...
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https://www.xero.com/us/glossary/ein/
What is an EIN? Definition, uses, and how to get one | Xero US
Learn what an employer identification number (EIN) is, who needs one, what it's used for, and how to apply for free directly through the IRS in minutes.
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