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.