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Directory Results for 990 Return of Organization Exempt From Income Tax Under section 507(c), 527, or 4947(a)(1) of the Internal Revenue Code (except black lung benefit trust or private foundation) Department W the Treasury Intemal Revenue Sernce &quot to 990 Return of Organization Exempt From Income Tax Under section 50i(c), 527, or 4947(a)(1) of the Internal Revenue Code (except black lung benefit trust or private foundation) Department of the Treasury Internal Revenue Service B check