If you want to apply for federal tax exemption for your charity or nonprofit, complete form 1023 and send it to the IRS with the required attachments and fee. To be taxexempt under section 501(c)(3) of the Internal Revenue Code, an organization must be organized and operated exclusively for exempt purposes.As of January 31, 2020, Form 1023 applications for recognition of exemption must be submitted electronically online at Pay.gov. This form should be used if you wish to file articles of incorporation for a domestic nonprofit corporation. Name of Corporation. You'll also need to submit: • A copy of the IRS Determination Letter granting tax-exempt status. During registration your organization will be required to submit its creating documents and the Federal Tax Exemption Determination Letter. If the IRS determines that a nonprofit organization is tax-exempt, it will issue the nonprofit corporation a tax- exempt determination letter. The IRS's Exempt Organizations Selection Check can be used to verify if an organization has a valid 501(c)(3) or other tax-exempt designation. There is no official IRS form that the exempt organization has to complete.