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General information and technical guidance for electronic return originators, software developers, and transmitters interested in transmitting tax returns through the MeF system.

IRS requires all tax preparation software used for preparing electronic returns to pass the requirements for Modernized e-File Assurance Testing (ATS).

This page provides information and techincal guidance for software developers and transmitters interested in developing software for the Modernized e-file Forms 2290, 720, and 8849.

Information and technical guidance for software developers and transmitters who are interested in developing software for the Modernized e-File Form 1065.

Exempt Organization Modernized e-File XML Schemas and Associated Information

Employment Tax e-file information for Electronic Return Originators (EROs)

Modernized e-File (MeF) for Employment Taxes

Software Developer Fact Sheet for the employment tax e-file program.

Modernized e-File (MeF) for employment taxes frequently asked questions (FAQs) communicates common questions and answers regarding the 94x MeF Program.

Find ATS scenarios, known issues and solutions for the Information Return Intake System (IRIS).