Gather the information you will need to apply for the EIN. For example, Form SS-4 will ask you to provide information about the trust including the name of the trust, the trustee's name, and the mailing address for the trust. In addition, the IRS will want to know the grantor’s Social Security number, the type of trust and the date the trust was funded.
Obtain Form SS-4 from the IRS. The form is available on the IRS website, and through one of the IRS local offices.
Complete Form SS-4 according to the instructions to obtain an Employment Identification Number, or EIN. The EIN is the same thing as a trust’s federal taxpayer identification number, or TIN. You can complete Form SS-4 online, by phone, fax or through the mail.
Wait to receive the EIN. If you apply for an EIN online or over the phone, the IRS will issue the number immediately.