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This guide lists resources for research in the nonprofit area. It includes search engines, databases and catalogs for locating books, articles, organizations and data.

Sources for 990s

Tax exempt organizations that make more than $200,000 in revenue and have more than $500,000 in assets, must file a 990 every year with the IRS. Those making less than $200,000 and with assets under $500,000 file the 990-EZ. Smaller organizations making less than $50,000 file the e-Postcard.