The Tax Year 2020 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. Tax Year 2020 7004 MeF ATS Scenarios 7004 MeF ATS Scenario 1PDF – (9/30/2020) 7004 MeF ATS Scenario 2PDF – (9/30/2020) 7004 MeF ATS Scenario 3PDF – (9/30/2020) 7004 MeF ATS Scenario 4PDF – (9/30/2020) 7004 MeF ATS Scenario 5PDF – (9/30/2020) 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