Federal Tax ID
Here is who needs a federal tax ID:
All businesses and non profits as well as trusts and sports league operations have to obtain a federal tax ID number.
First, corporations or LLCs, employers, partnerships, and independent contractors are required to obtain a Federal Id (FEIN). You can use a federal id as your business ID.
For example, most sole owners that are not employers and are not independent contractors use their social sec number as a business tax ID. However, even sole owners that are not employers and are not independent contractors may obtain and use a federal tax ID as a business tax ID.