ATS opened on Oct. 28, 2024, for filing season 2025. Modernized e-File (MeF) ATS calls Call logs: MeF ATS call log 10/29/2024 PDF MeF ATS call log 10/30/2024 PDF MeF ATS call log 10/31/2024 PDF Modernized e-File (MeF) Assurance Testing System (ATS) updates The Modernized e-File (MeF) Assurance Testing System (ATS) scenarios and known issues are listed in the table below. PY2025 ATS scenario form Tax period ATS scenario known issues and solutions Comments 720 2025 720 ATS known issues 94x form family (Annual) 2024 94x ATS known issues 94x form family (Quarterly) 2025 94x ATS known issues XLS 990 form family/1120 POL 2024 990 ATS known issues 1040 series and extensions 2024 1040 series and extensions ATS known issues XLSX 12/4/2024 – The 1040 series ATS known issues and solutions file has been updated. 11/5/2024 – The 1040 series and extensions ATS known issues and solutions file has been updated. 11/5/2024 – The 1040 MeF series ATS scenario 5 was updated to reflect the Section 508 compliant file. No changes were made to the information or figures within the scenario. 10/29/2024 – The 1040 series and extensions ATS known issues and solutions file has been updated. 10/22/2024 – The 1040 series and extensions ATS known issues and solutions file has been updated. 10/10/2024 – The 1040 series and extensions ATS known issues and solutions file has been updated. 1041 2024 1041 ATS known issues PDF 1042 2024 1042 ATS known issues 1065 form family 2024 1065 ATS known issues XLS 1120 form family 2024 1120 ATS known issues 2290 2024 2290 ATS known issues 2290 2025 2290 ATS known issues 7004 2024 7004 ATS known issues 8849 2025 8849 ATS known issues 8868 2024 8868 ATS known issues PY2024 ATS scenario form Tax period ATS scenario known issues and solutions Comments 720 2024 720 ATS known issues 94x form family (2023) 2023 94x ATS known issues XLS 05/29/2024 – Form 943-X scenario posted to the TY2023 ATS page. 94x form family (2024) 2024 94x ATS known issues XLS 05/29/2024 – Form 941-X scenario posted to the TY2024 ATS page. 990 form family/1120 POL 2023 990 ATS known issues 1040 series and extensions 2023 1040 series and extensions ATS known issues XLSX 12/19/2023 – 1040 series and extensions ATS known issues and solutions file updated. 12/6/2023 – 1040 series and extensions ATS known issues and solutions file updated. 11/29/2023 – 1040 series and extensions ATS known issues and solutions file updated. 11/16/2023 – 1040 series and extensions ATS known issues and solutions file updated. 11/7/2023 – 1040 series and extensions ATS known issues and solutions file updated. 11/1/2023 – 1040 series and extensions ATS known issues and solutions file updated. 1041 2023 1041 ATS known issues 1042 2023 1042 ATS known issues 1065 form family 2023 1065 ATS known issues PDF 1120 form family 2023 1120 ATS known issues XLS 2290 2023 2290 ATS known issues 2290 2024 2290 ATS known issues 7004 2023 7004 ATS known issues 8849 2024 8849 ATS known issues 8868 2023 8868 ATS known issues PY2023 ATS scenario form Tax period ATS scenario known issues and solutions Comments 720 2023 720 ATS known issues 94x form family (2022) 2022 94x ATS known issues 94x form family (2023) 2023 94x ATS known issues 990 form family/1120 POL 2022 990 ATS known issues 1040 series and extensions 2022 1040 series and extensions ATS known issues XLSX 11/22/2022 – 1040 ATS known issues and solutions has been updated. 11/22/2022 – All 1040 series and extensions ATS scenarios for processing year 2023 are available. 11/8/2022 – 1040 ATS scenario known issues and solutions has been updated. 1041 2022 1041 ATS known issues XLS 1042 2022 1042 ATS known issues XLSX 1065 form family 2022 1065 ATS known issues XLS 1120 form family 2022 1120 ATS known issues XLS 2290 (2023) 2290 (2022) 2023 2022 2290 ATS known issues 7004 2022 7004 ATS known issues 8849 2023 8849 ATS known issues 8868 2022 8868 ATS known issues PY2022 ATS scenario form Tax period ATS scenario known issues and solutions Comments 720 2022 720 ATS known issues 94x form family (2021) 2021 94x ATS known issues 94x form family (2022) 2022 94x ATS known issues XLS 990 form family/1120 POL 2021 990 ATS known issues 1040 series and extensions 2021 1040 series and extensions ATS known issues XLSX Find all MeF publications on the MeF user guides and publications page. Information on the distribution of Modernized e-File (MeF) new web service definition language (WSDL) can be found on the Modernized e-File (MeF) status page. Modernized e-File (MeF) program information
