If you need an EIN, fill out a copy of Form SS-4 and apply by one of these methods:
Apply by EIN Toll-Free Telephone Service
Taxpayers can obtain an EIN immediately by calling the Business & Specialty Tax Line (800-829-4933). The hours of operation are 7:00 a.m. to 5:00 p.m. local time, Monday through Friday. An assistor takes the information, assigns the EIN, and provides the number to an authorized individual over the telephone.
Apply by Fax
Taxpayers can fax the completed Form SS-4 application to their state fax number (see Where to File Your Taxes above), after ensuring that the Form SS-4 contains all of the required information. If it is determined that the entity needs a new EIN, one will be assigned using the appropriate procedures for the entity type. If the taxpayer's fax number is provided, a fax will be sent back with the EIN within four (4) business days.
Apply by Mail
The processing timeframe for an EIN application received by mail is four weeks. Ensure that the Form SS-4 contains all of the required information. If it is determined that the entity needs a new EIN, one will be assigned using the appropriate procedures for the entity type and mailed to the taxpayer.
Apply by EIN Online
This Internet EIN (I-EIN) application is another avenue for customers to apply for and obtain an employer identification number. Once all the necessary fields are completed on the online form, preliminary validation is performed and the taxpayer will be alerted to information IRS needs that may not have been included. An EIN will be issued after the successful submission of the completed Form SS-4 online. Please note that not all business entity types may use this method.
3rd Party Authorization
A 3rd Party designee must fill out the SEC. 6103(c) disclosure information at the bottom of the Form SS-4. The Form SS-4 must also be signed by the taxpayer for the 3rd Party designee authorization to be valid. The Form SS-4 must be mailed or faxed to the appropriate service center. A 3rd Party designee may call for an EIN, however a faxed Form SS-4 is still required. IRS assistors will take the information over the phone from the 3rd Party designee and ask the 3rd Party designee to fax the completed Form SS-4 to them (to the IRS assistor's attention) at an administrative fax number. After receiving the faxed Form SS-4, the EIN will be assigned and faxed back to the 3rd Party designee. The 3rd Party designee's authority terminates at the time the EIN is assigned and released to the designee.
For additional information, see Obtaining an Employer Identification Number.
Information courtesy of the Internal Revenue Service