)
or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.
Check the operational status for the Modernized e-File (MeF) production and assurance testing systems.
Production System
Operational
Limited services: Sundays 12 a.m. – 9 a.m. ET
MeF accepts submissions but doesn’t generate acknowledgements or process state services during routine maintenance.
Assurance Testing System (ATS)
Operational
Service unavailable: June 30, 9 a.m. – 1 p.m. ET
MeF assurance testing system will be unavailable on Tuesday, June 30, 2026, from 9:00 am. until 1:00 p.m. Eastern time.
Limited services: Sundays 12 a.m. – 9 a.m. ET
MeF accepts submissions but doesn’t generate acknowledgements or process state services during routine maintenance.