Tax year 2021 Form 1065 Modernized e-File (MeF) Assurance Testing System (ATS) information

The Tax year 2021 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 2021 1065 MeF ATS scenarios

1065 MeF ATS Scenario 1 (Form 1065)PDF – (9/30/2021)
1065 MeF ATS Scenario 2 (Form 1065)PDF – (9/30/2021)
1065 MeF ATS Scenario 3 (Form 1065)PDF – (10/20/2021)
1065 MeF ATS Scenario 4 (Form 1065)PDF – (9/30/2021)
1065 MeF ATS Scenario A (Form 1065 K-1 Aggregator)PDF – (9/30/2021)
1065 MeF ATS Scenario B (Form 1065 K-1 Aggregator)PDF – (9/30/2021)

For information and questions regarding ATS, please contact the e-help Desk at 866-255-0654.