You can obtain form SS-4, Application for Employer Identification Number (EIN) from the Internal Revenue Service (IRS).  The form is available from the IRS at http://www.irs.gov/pub/irs-pdf/fss4.pdf .  Instructions on completion and mailing of the form can be found at http://www.irs.gov/instructions/iss4/ch01.html.

The IRS also allows you to complete an online request for an EIN.  See  http://www.irs.gov/businesses/small/article/0,,id=102765,00.html for more information on this. 

Questions about form SS-4 and its completion should be directed to the IRS.