Make copies to mail with your application. Review the requirements and process for obtaining an employer identification number for tax-exempt organizations.A Church Organization's Tax ID number is called an "employer identification number," or EIN, and comes in the format 12-3456789. If your church or ministry needs a Tax ID, the link to apply online is below. You can also print out and mail a form (Form SS-4). The site will guide you through an application interview that will help you determine your tax obligations. If you do not have Internet access, you can complete. Our legal team outlines the step-by-step process below. We've helped hundreds of churches and ministries obtain 501c3 status and thrive.