Approved IRS e-File for business providers Find an Approved IRS Modernized e-File (MeF) Business Provider that meets your tax filing needs. Known issues and solutions Known issues and solutions archives for all years. The page contains information for all MeF form families. Modernized e-File (MeF) Assurance Testing System (ATS) Modernized e-File (MeF) Assurance Testing System (ATS) information is provided to keep you up-to-date on the latest news and status of issues. Modernized e-File (MeF) forms Find out what tax forms can be e-filed through the MeF system. Modernized e-File (MeF) internet filing MeF internet filing is available for Corporate, Employment, Estates & Trusts, Exempt Organization, Excise, Individual, and Partnerships Tax Returns. Modernized e-File (MeF) program overview Find links to MeF form-specific information. Modernized e-File (MeF) schemas and business rules Information regarding XML schemas and business rules is provided for Software Developers and Transmitters who are interested in developing software for the MeF Program. Modernized e-File (MeF) status Find the status of the IRS Modernized e-File Status (MeF) System, systems status, information on production calls, filing season start dates, and system updates. Modernized e-File (MeF) stylesheets MeF stylesheets can be used by external stakeholders to display corporate, employment, partnerships, estates & trusts, exempt organizations, excise tax, and individual tax returns. The stylesheets may be used by software developers, states and/or taxpayers to incorporate into their programs as appropriate. Modernized e-File (MeF) user guides and publications General information and technical guidance for electronic return originators, software developers, and transmitters interested in transmitting tax returns through the MeF system.