The IRS has given the authority to the business owner to grab EIN for his business. Yes, this is the helping hand that identifies a business entity that what kind of business with state code the owner is running his business. This is the primary tax ID for businesses. If you have your business and want to apply for some business loans, EIN will be required before you apply for a business checking account. Moreover, the things to be measured here are many for having an EIN number.