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Tax year 2025, form 1040 Modernized e-File (MeF) Assurance Testing System (ATS) information is outlined below. If you support these forms, you will need to contact the e-Help Desk for testing. Please monitor this page for any tax year 2025, form 1040 series and extensions ATS scenario updates.
ATS opens on Oct. 14, 2025
Tax year 2025 Form 1040 series and extensions MeF ATS scenarios
- 1040 MeF ATS scenario 1 (Form 1040) PDF – 09/15/2025
- 1040 MeF ATS scenario 2 (Form 1040) PDF – 09/15/2025
- 1040 MeF ATS scenario 3 (Form 1040) PDF – 09/15/2025
- 1040 MeF ATS scenario 4 (Form 1040)
- 1040 MeF ATS scenario 5 (Form 1040)
- 1040 MeF ATS scenario 6 (Form 1040-SS)
- 1040 MeF ATS scenario 7 (Form 4868) PDF – 09/15/2025
- 1040 MeF ATS scenario 8 (Form 1040)
- 1040 MeF ATS scenario 12 (Form 1040) PDF – Not valid in ATS until 11/2/2025
- 1040 MeF ATS scenario 13 (Form 1040 PDF) – Not valid in ATS until 11/2/2025
- 1040 MeF ATS scenario 1 (Form 1040-NR)
- 1040 MeF ATS scenario 2 (Form 1040-NR) PDF – 11/02/2025
- 1040 MeF ATS scenario 3 (Form 1040-NR)
- 1040 MeF ATS scenario 4 (Form 1040-NR)
- 1040 MeF ATS scenario 12 (Form 1040-NR)
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 2025 Modernized e-File schema and business rules for individual tax returns and extensions