The Internal Revenue Service (IRS) Modernized e-File (MeF) system will be unavailable from 11:59 a.m. on Tuesday, December 27, 2011, through 9:00 a.m. on Monday, January 9, 2012, for end of year maintenance. The IRS MeF system will begin accepting business e-file returns on January 9, 2012.

Although the IRS will begin accepting business e-file returns on January 9, 2012, Michigan will not begin retrieving and accepting MBT e-file returns until January 17, 2012, and therefore, will begin issuing acknowledgments for MBT e-file returns on January 18, 2012.

In preparation for this maintenance period Michigan recommends that first time MBT e-file returns are transmitted no later than December 19, 2011. Previously rejected MBT e-file returns can be retransmitted through December 21, 2011. This will allow time to make Michigan acknowledgements available before the IRS maintenance period.
MBT e-file returns submitted to the IRS MeF system after December 27, 2011, will not be acknowledged by Michigan until January 18, 2012.

Return status information using Michigan’s Web self service feature “Check My Business Tax Info” will be available after January 18, 2012, for returns submitted to the IRS MeF during this period.

Developers producing MBT tax preparation software and computer-generated forms must support e-file for all eligible Michigan forms that are included in their software package. All eligible MBT returns prepared using tax preparation software or computer-generated forms must be e-filed.

Treasury will not process computer-generated paper returns that are eligible to be e-filed. A notice will be mailed to the taxpayer indicating that their return was not filed in the proper form and content and must be e-filed. Payment received with a paper return will be processed and credited to the taxpayer's account even when the return is not processed.

Additional information will be published on Treasury's Web site as it becomes available.

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