How do you apply for your federal tax ID?

Obtain IRS form SS-4, fill in the appropriate information and send it to the regional IRS office listed on the back of the form. You might be able to fax the form to the IRS. If the form is needed immediately, you may be able to obtain the number over the phone. All instructions are on the 2 page form. Go to www.irs.gov to get the form.