The tax year 2023 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 2023 1065 MeF ATS Scenarios 1065 MeF ATS Scenario 1 (Form 1065) PDF 10/14/2023 1065 MeF ATS Scenario 2 (Form 1065) PDF 10/14/2023 1065 MeF ATS Scenario 3 (Form 1065) PDF 11/16/2023 (revised) 1065 MeF ATS Scenario 4 (Form 1065) PDF 11/16/2023 (revised) 1065 MeF ATS Scenario A (Form 1065 K-1 Aggregator) PDF 10/14/2023 1065 MeF ATS Scenario B (Form 1065 K-1 Aggregator) PDF 11/16/2023 (revised) 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 2023 1065 MeF schemas and business rules
