Tax year 2021 7004 MeF ATS scenarios 7004 MeF ATS scenario 1PDF – (10/27/2021) 7004 MeF ATS scenario 2PDF – (10/27/2021) 7004 MeF ATS scenario 3PDF – (10/27/2021) 7004 MeF ATS scenario 4PDF – (10/27/2021) 7004 MeF ATS scenario 5PDF – (10/27/2021) For information and questions regarding ATS, please contact the e-Help Desk at 866-255-0654. Modernized e-File (MeF) Assurance Testing System (ATS) Updates page The Tax year 2021 7004 Modernized e-File (MeF) Assurance Testing System (ATS) information is contained below. If you support these forms, you will need to contact the e-Help Desk for testing. Please monitor this page for any ATS scenario updates. For information and questions regarding ATS, please contact the e-Help Desk at 866-255-0654. Modernized e-File (MeF) Assurance Testing System (ATS) Updates page
