BIRMINGHAM — The filing deadline for about 138,000 Alabama taxpayers who requested an extension to file their 2009 tax returns is tomorrow, Oct. 15. Taxpayers can still e-file their 2009 returns until midnight Friday.

Oct. 15 is also a crucial due date for approximately 4,500 small nonprofit organizations in Alabama that are at risk of losing their tax-exempt status due to not filing for the last three years.

Many small nonprofit organizations are at risk of losing their tax-exempt status because, according to IRS records, they failed to file the required returns for 2007, 2008 and 2009. They can preserve their status by filing returns by Oct. 15 under the one-time relief program announced by the IRS in July.

The names and last-known addresses of these at-risk organizations are posted on IRS.gov, along with guidance about how to keep their tax-exempt status. Small nonprofits may only need to file Form 990-N online at IRS.gov, which usually takes about 10 minutes.