Modernized e-File (MeF) Status


Modernized e-File (MeF) Operational Status 

Modernized e-File (MeF) Production Calls

When: To be announced

Call-in Number: 888-331-8226 Access Code 3600320

MeF Production Call Log 03/17/2020 PDF

MeF Production Call Log 03/26/2020 PDF

Filing Season Start Dates:

Business tax returns: January 7, 2020

Individual tax returns: January 27, 2020

Form 1040 Amended with Form 1040-X : August 17, 2020


Schemas and Business Rules: Beginning September 2016 Software Developers and State organizations started receiving the schemas and business rules through their e-Services mailbox rather than downloading them from the IRS website. 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.  These mailbox messages are purged after 30 days so please make sure to download them as soon as possible. Instructions for accessing the SOR Mailbox PDF were created for your use. You may access the login page, register for e-services, reset your password, and make changes to your existing account on e-Services Online Tools for Tax Professionals.

Refer to Modernized e File MeF Schemas and Business Rules for additional details on versions and dates for each form family. (Updated 3/15/2017)

Distribution of Modernized e-File (MeF) New Web Service Definition Language (WSDLs):

(Updated 08/05/2020)

WSDLs for Tax Year 2020 / Processing Year 2021 are available (WSDL version R10.4)

The new WSDLs will be installed in the MeF Test environment (ATS) in October 2020. They will also be required for MeF Production for Processing Year 2021.

To request a copy of the latest WSDLs please send a request to MeF mailbox @ with your company name and ETIN.

As a reminder you should be using the "la.alt" (la.alt.www4) for ATS and "la" main" URL (la.www4) for Production environments.