These resources were contributed by Attorney David "Rosebud" Sparer as a resource for housing co-op organizers looking to incorporate as a non-profit or a cooperative. 1023 exemption application.pdf 990 public support test.pdf Articles of incorporation - Wisconsin.pdf Articles of Incorporation attachment.pdf IRS statutes & rules.pdf Safe Harbor Rev Ruling.pdf HUD income figures.pdf income disclosure form.pdfCategories: DevelopmentStart-upsIncorporation