Modernized e-File (MeF) Assurance Testing System (ATS)

ATS opened for testing on October 24, 2022 for IMF and BMF tax returns that will be processed in 2023.

When: October 25, 26, and 27, 2022
Time: 2 p.m. EST
Conference number: 888-331-8226, participant code 3600320
Call Logs:

The Modernized e-File (MeF) Assurance Testing System (ATS) Scenarios and Known Issues are listed in the table below.

ATS Scenario Form	Tax Period	ATS Scenario Known Issues and Solutions	Comments
1120 Form Family	2022	1120 ATS Known IssuesXLS
1065 Form Family	2022	1065 ATS Known IssuesXLS
2290	2023	2290 ATS Known Issues	ATS Scenarios are expected to be posted on IRS.gov on or before June 1, 2023.
720	2023	720 ATS Known Issues
8849	2023	8849 ATS Known Issues
1040 Series and Extensions	2022	1040 Series and Extensions ATS Known IssuesXLSX	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. 11/08/2022: 1040 ATS Scenario Known Issues and Solutions has been updated.
94x Form Family (2022)	2022	94x ATS Known Issues
94x Form Family (2023)	2023	94x ATS Known Issues
1041	2022	1041 ATS Known IssuesXLS
1042	2022	1042 ATS Known Issues
990 Form Family/1120 POL	2022	990 ATS Known Issues
7004	2022	7004 ATS Known Issues
8868	2022	8868 ATS Known Issues

ATS Scenario Form	Tax Period	ATS Scenario Known Issues and Solutions	Comments
1120 Form Family	2021	1120 ATS Known IssuesPDF
1065 Form Family	2021	1065 ATS Known IssuesPDF
2290	2022	2290 ATS Known Issues
720	2022	720 ATS Known Issues
8849	2022	8849 ATS Known Issues
1040 Series and Extensions	2021	1040 Series and Extensions ATS Known IssuesXLSX	07/26/2022: The 1040 Series and Extensions ATS Known Issues file has been modified and is available. 07/21/2022: The 1040 Series and Extensions ATS Known Issues file has been modified only to correct file display issues. 06/14/2022: The 1040 Series and Extensions ATS Known Issues file has been modified and is available. 01/07/2022: The 1040 Series and Extensions ATS Known Issues file has been modified and is available. 01/07/2022: 1040 MeF ATS Scenarios 2 and 5 have been modified and are available. 01/07/2022: 1040-NR ATS Scenario 1 has been modified and is available. 12/20/2021: 1040 MeF ATS Scenario 5 has been modified and is available. 12/20/2021: The 1040 Series and Extensions ATS Known Issues file has been modified and is available.
94x Form Family (2021)	2021	94x ATS Known Issues
94x Form Family (2022)	2022	94x ATS Known IssuesXLS
1041	2021	1041 ATS Known Issues
990 Form Family/1120 POL	2021	990 ATS Known Issues
7004	2021	7004 ATS Known Issues
8868	2021	8868 ATS Known Issues

ATS Scenario Form	Tax Period	ATS Scenario Known Issues and Solutions	Comments
1120 Form Family	2020	1120 ATS Known IssuesXLS	ATS Scenario 10 will not be available at the start of ATS.
1065 Form Family	2020	1065 ATS Known Issues
2290	2021	2290 ATS Known Issues
720	2021	720 ATS Known Issues
8849	2021	Scenario 6 will not be valid until 11/22/20
1040 Series and Extensions	2020	1040 Series and Extensions ATS Known IssuesDOCX	03/04/2021: 1040 MeF ATS Scenario 1 (Form 1040-NR) is available and will be operational in the Assurance Testing System on March 07, 2021.
94x Form Family (2020)	2020	94x ATS Known Issues
94x Form Family (2021)	2021	94x ATS Known Issues
1041	2020	1041 ATS Known Issues
990 Form Family/1120 POL	2020	990 ATS Known Issues
7004	2020	7004 ATS Known Issues
8868ZIP	2020	8868 ATS Known Issues

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 (WSDLs) can be found on the Modernized e-File (MeF) Status page.