The tax year 2024 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 2024 1065 MeF ATS scenarios 1065 MeF ATS scenario 1 (Form 1065) PDF 1065 MeF ATS scenario 2 (Form 1065) PDF 1065 MeF ATS scenario 3 (Form 1065) PDF 1065 MeF ATS scenario 4 (Form 1065) PDF 1065 MeF ATS scenario A (Form 1065 K-1 aggregator) PDF 1065 MeF ATS scenario B (Form 1065 K-1 aggregator) PDF 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 Tax year 2024 1065 MeF schemas and business rules