First, the organization must engage primarily in activities which accomplish one or more of the exempt purposes specified in [IRC] § 501(c)(3). Second, the organization's net earnings may not inure to the benefit of private shareholders or individuals. Third, the organization must not expend a substantial part of its resources attempting to influence legislation or political campaigns . . . [Fourth,] [o]rganizations seeking exemption from taxes must serve a valid purpose and confer a public benefit.
Estate Tax Refund Request Untimely