Modernized eFile (MeF) Operational Status

Current System Status: 
Production System: Operational
Assurance Testing System (ATS): Operational

Scheduled Maintenance Build: A routine system maintenance build is scheduled every Sunday from 1:00 a.m. to 7:00 a.m. Eastern. (Updated 8/17/2017)


Assurance Testing System (ATS) Cutover October 15, 2018 – October 29, 2018:  MeF ATS will be taken off-line after 9:00 a.m., Monday, October 15, 2018, until 9:00 a.m., Monday, October 29, 2018. The TY2018/PY2019 WSDLs, schemas and business rules will be loaded during this cutover. All existing test submissions will be deleted except for those sent in during the thirty days prior to cutover.(Updated 10/03/2018)

New Schemas and Business Rules are Available! Software Developers and State organizations 1ay access and download new Schemas and/or Business Rules from their e-Services )mailbox. In order to access these files you must have an active e-Services account and be listed on an e-File application with the provider option of Software Developer or State. Your role must be Responsible Official, or Delegated User with MeF authorities.(Updated 10/10/2018)

Tax Year 2018 / Processing Year 2019, 1040 series business rules version 4.0 is available now. These business rules will be operational in the Assurance Testing System (ATS) on October 29, 2018, but will not be operational in Production. The 1040 series schema version 4.0 was previously made available on August 16, 2018.(Updated 10/10/2018)

  •  F1040 series 2018v4.0
  • An early look of the Tax Year 2018 Form 1040 schema is available. It does not include Form 1040 Schedules (1 through 6) or Form 965 and attachments. This early look schema will be used for Assurance Testing but not in the Production environment. TY 2018 Stylesheets and Business Rules will be made available at a later date. (updated 08-16-2018)
  • Tax Year 2018 Schemas and Business Rules are available. (updated 08-20-2018)
    Schema and Business rules:
      • F990x              2018v2.1
      • F1120POL       2018v1.2
      • F1065              2018v3.0
      • F1041              2018v3.0
      • F1120              2018v4.0
      • F7004              2018v2.0
    Business Rules Only:
      • F720               2019v1.0 Q1-Q4 Business rules only

Modernized e-File (MeF) Production Calls: TBD

Filing Season Start dates: TBD

For more information regarding MeF, please see the Modernized e-File (MeF) Program Information on