The Tax Year 2018 1065 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. TY 2018 1065 MeF ATS Scenarios 1065 MeF ATS Scenario 1 PDF (Form 1065) – 12/07/20181065 MeF ATS Scenario 2 PDF (Form 1065) – 12/07/20181065 MeF ATS Scenario 3 PDF (Form 1065) – 12/07/20181065 MeF ATS Scenario 4 PDF (Form 1065) – 12/07/20181065 MeF ATS Scenario 5 PDF (Form 1065 K-1 Aggregator) – 12/07/20181065 MeF ATS Scenario 6 PDF (Form 1065 K-1 Aggregator) – 12/07/2018 For information and questions regarding ATS, please contact the e-help Desk at 1-866-255-0654. Modernized e-File (MeF) Assurance Testing System (ATS) Updates Page