The IRS’ e-File system for Forms 990, 990-EZ, 990-PF will be down for January and February 2012, according to the IRS web site. Will not affect the filing system for 990-Ns.
See their announcement here.
From the first paragraph of the note:
In order to facilitate systems and programming changes, the IRS today notified tax-exempt organizations that the IRS Modernized e-file (MEF) system will not be available from January 1, 2012 through February 29, 2012 for electronic filing of Forms 990, 990-EZ, 990-PF and 1120-POL information returns. The IRS is suspending the availability of the system to implement changes to IRS programs and systems for the 2011 tax year. The 990-N e-postcard filing system will not be affected by the temporary suspension of the MeF system