The tax year 2024 Form 1120 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 1120 MeF ATS scenarios 1120 MeF ATS scenario 1 (Form 1120) PDF (10/24/2024) 1120 MeF ATS alt scenario 1 (Form 1120) PDF (10/11/2024) 1120 MeF ATS scenario 2 (Form 1120) PDF (10/22/2024) 1120 MeF ATS scenario 3 (Form 1120) PDF (10/25/2024) 1120 MeF ATS scenario 4 (Form 1120) PDF (10/23/2024) 1120-S MeF ATS scenario 5 (Form 1120-S) PDF (10/18/2024) 1120-S MeF ATS scenario 6 (Form 1120-S) PDF (10/18/2024) 1120-S MeF ATS scenario 7 (Form 1120-S) PDF (10/18/2024) 1120-S MeF ATS scenario 8 (Form 1120-S) PDF (10/18/2024) 1120-F MeF ATS scenario 9 (Form 1120-F) PDF (11/5/2024) 1120-H MeF ATS scenario 10 (Form 1120-H) PDF (11/18/2024) 1120 MeF ATS scenario 11 (Form 1120) (TBD) For information and questions regarding ATS, please contact the e-Help Desk at 866-255-0654. Modernized e-File (MeF) Assurance Testing System (ATS) Tax year 2024 1120 MeF schemas and business rules
