The organization must have an EIN before an application for exemption can be submitted. Download Form SS-4, Application for Employer Identification NumberPDF, and its related instructionsPDF to learn how to obtain an EIN. You may apply for an EIN online, by fax or by mail. Does the organization have an EIN? Yes | No Additional information Employer Identification Number Publication 1635, Understanding Your EINPDF How to apply for an EIN