IRS 990s
From FreecycleFAQ
What is the "Form 990"?
From the Wikipedia page:
The IRS Form 990 is titled "Return of Organization Exempt From Income Tax." It is submitted by tax-exempt organizations and non-profit organizations to provide the Internal Revenue Service with annual financial information.
Forms are available for each of these years:
form990/2005
form990/2006
form990/2007
form990/2008