The tax year 2025 Form 8849 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 2025 Form 8849 MeF ATS scenarios: 8849 MeF ATS scenario 1 PDF 8849 MeF ATS scenario 2 PDF 8849 MeF ATS scenario 3 PDF 8849 MeF ATS scenario 4 PDF 8849 MeF ATS scenario 5 PDF 8849 MeF ATS scenario 6 PDF 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 page
