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Check the operational status for the Modernized e-File (MeF) production and assurance testing systems.
Production System
Operational
Limited services: Sundays 12 a.m. – 8 a.m. ET
MeF accepts submissions but doesn’t generate acknowledgements or process state services during routine maintenance.
Assurance Testing System (ATS)
Operational
Limited services: Sundays 12 a.m. – 8 a.m. ET
MeF accepts submissions but doesn’t generate acknowledgements or process state services during routine maintenance.