While organizations without 501c3 status can't apply for grants, there are still ways to legally accept donations, fund their business, and serve the community. Organizations applying for exemption under section 501(c)(6) file Form 1024.Enter the total dollar amount of the organization's annual gross revenue (AGR), fundraising expenses, and administrative expenses for the previous year. We've created this stepbystep guide on everything you need to know about creating a donation receipt letter for tax purposes. Exemption applications must be filed with your local assessor's office. See our Municipal Profiles for your local assessor's mailing address. To be taxexempt under section 501(c)(3) of the Internal Revenue Code, an organization must be organized and operated exclusively for exempt purposes.