Tax year 2023 Form 1065 Modernized e-File (MeF) Assurance Testing System (ATS) information

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