Any business operating in the U.S is definitely required by the Internal Revenue Service (IRS) to register for an Employer Identification Number (EIN) – commonly known as the Tax ID Number. Similar to the SSN used to identify individual taxpayers, EIN is used by IRS to identify business entities. It is a mandatory to mention your business’s EIN on all tax documents and forms. To understand which businesses require an EIN, it is essential to know the taxes inferred on any of the products and services being offered. If your state requires you to levy sales tax on your revenue from products and services, you need to register an EIN to file your tax returns. Almost all businesses that employ individuals or pay federal, state or local taxes ought to have an Employer Identification Number.

In order to know how to apply for EIN online, go through the following guidelines:


  • Determine Eligibility for EIN


Almost all businesses require an EIN. To make sure your business does, please visit this link. Go through the checklist to determine whether you require an EIN or not. If the following conditions are true, you may need it.

      • Your business employs individuals
      • Nature of business is a corporation or a partnership
      • You submit employment or excise returns
      • Your business is engaged in any type of transaction with nonprofits, trusts, or farmer’s cooperatives


  • Fill out the Online Application Form


Use the online official IRS Form to apply for EIN. The form can be accessed from 7 am – 10 pm during Monday to Friday. You only need to give basic information about the organization. The website generates an EIN immediately if you provide correct details and meet the following eligibility standards:

  • The applicant must be a responsible individual in the organization – either the owner or a partner. The applicant ought to possess a valid Taxpayer Identification Number (TIN) especially an SSN.
  • The location of the business must be inside U.S or U.S territories.


  • Call for Assistance


If you confront any problems while filling out the application or already have an EIN but do not know how to submit your returns, call IRS at (800) 829-4933. If you are calling from an international line, dial 267-941-1099 instead.


  • Mail/Fax the Application Form


To fill out a manual application, print Form SS-4 or visit the nearest IRS office and request a free copy of the form. Make sure to go through the instructions before filling out the form. The instructions provide details related to any individual situation. Fill out the application form and mail it to one of the following addresses:

  • Mail, applicants residing in a U.S State of District of Columbia:

Internal Revenue Service

Attention: EIN Operation

Cincinnati, OH 45999

    • Fax, U.S Applicants: (859) 669-5760
    • Mail, International Applicants:

Internal Revenue Service

Attention: EIN International Operation

Cincinnati, OH 45999

    • Fax, International Applicants: (859) 669-5987

Expect a response via mail in 25 business days and reply via fax within 5 business days if a return fax number is provided.


  • Know how to Submit your Tax Returns without an EIN


If you are in the process of getting your EIN issued and the deadline for filing tax returns is over, just send the returns along with the following representation.

  • In the EIN box, insert “Applied For”
  • Print and fill the Form SS-4 and confer it with the return.


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