The IRS will begin revoking tax-exempt status from nonprofits that have failed to file three consecutive annual returns (990-N, 990-EZ, 990 or 990-PDF).
We strongly encourage ALL arts organizations with tax-exempt status to refer to the IRS Web site for further clarification, and to check the status of their annual return filings for the last three years. Failure to file an annual return could potentially result in losing tax-exempt status.
http://www.irs.gov/charities/article/0,,id=217087,00.html
May 17, 2010 is the deadline for filing an annual return for organizations that use the calendar year as their fiscal year. Please note that small organizations with gross revenues of $25,000 or less are required to complete the 990-N (“e-postcard”).
For additional information, please see:
IRS Automatic Revocation of Tax-Exempt Status for Failure to File Annual Return or Notice – Frequently Asked Questions and Answers: