American Alliance of Museums
Museum magazine explains the importance of the IRS’s Form 990, what kind of compensation information is required for the report, and how museums report and value collections.
Internal Revenue Service
The Internal Revenue Service (IRS) offers Stay Exempt: Tax Basics for 501(c)(3)s. The free online workshop includes an interactive training modules on Form 990, employment issues and unrelated business income. It covers tax compliance issues faced by small and mid-sized tax exempt organizations and provides links to the IRS forms and publications discussed.
The Urban Institute has created a site where nonprofits can fill out the 990 and file it electronically with the Internal Revenue Service (IRS). They also provide free technical support.