501 Commons - Features an excellent document entitled: “Guide to Starting a Nonprofit.” It takes one from whether and why to start a nonprofit through all the legal steps and includes links to many of the organizations that one must deal with to start a nonprofit organization.
How to Read the IRS Form 990 - The IRS Form 990 gives public information about nonprofit organizations. This Web site helps you understand how to interpret the form.
The Unified Registration Statement - Organized by the National Association of State Charities Officials and the National Association of Attorneys General to consolidate information and data requirements of all states requiring registration of nonprofit organizations that perform charitable solicitations within their jurisdictions. Its aim is to standardize and simplify compliance with the various states’ solicitation laws.