In 2006, Congress passed a law requiring all tax-exempt organizations, even the smallest ones, to file an annual return with the Internal Revenue Service. Any organization that does not file for three consecutive years automatically loses its federal tax exemption. Churches and some church-related organizations are among the few exceptions.
The first three-year deadline for filing those returns was May 17, 2010. While thousands of organizations did file, a significant number did not.
The IRS extended the filing deadline to October 15, 2010. It also published a list with the names and last known addresses of organizations that are at risk of losing their tax exempt status. Further information, including instructions how to file and a list of the organizations the IRS found at risk of losing their exempt status, can be found at: http://www.irs.gov/charities/article/0,,id=225705,00.html