The NAO Guide to Starting a Nonprofit in Oregon provides a host of information and resources for starting a 501(c)(3) tax-exempt charitable nonprofit corporation in Oregon. Included are definitions, data, considerations, steps to start and maintain a nonprofit, an overview of fiscal sponsorship, board member fundamentals, startup resources, and legal service providers and culturally specific resources.
You can download the guide below.
Here is the NAO resource page for Starting a Nonprofit in Oregon.
Here is A Walk-Through IRS Form 1023: Applying for Section 501(c)(3) Recognition – Wagenmaker & Oberly