The following links provide information and technical guidance for software developers and transmitters who are interested in developing software for the Modernized e-File Form 1042. You will find the XML schemas, business rules and other useful information separated by tax year.

Production and Acceptance Testing System (ATS) — Current valid schemas

Tax yearForm type
2026Form 1042
2025Form 1042
2024Form 1042
2023Form 1042
2022Form 1042

Modernized e-File (MeF) schemas and business rules