Benefits of 1040 Modernized e-File Frequently Asked Questions for 1040 Modernized e-File (MeF) Modernized e-File (MeF) Assurance Testing System (ATS) Updates 1040 Modernized e-File (MeF) Information for Transmitters and States Contact the MeF Mailbox for questions or comments about the 1040 MeF Program. Modernized e-File (MeF) Program Information
