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The tables below provide links to the tax year 2026 Extensible Markup Language (XML) schemas, business rules, and release memorandum for the employment tax forms (Form 94x series).
Throughout the year, multiple versions of schemas and business rules may be in use at the same time. The table reflects the effective dates in the Assurance Testing System (ATS) and Production System, for each version.
Tax year 2026 documents
- Tax year 2026 94x MeF accepted forms and schedules PDF
- Tax year 2026 94x MeF ATS information
- Tax year 2026 94x MeF forms and attachment list XLSX
- Tax year 2026 94x MeF return due dates PDF
- Tax year 2026 94x MeF stylesheets
- Tax year 2026 known issues and solutions (Coming Soon)
Tax year 2026 Form 94xX (quarterly forms)
| Version | Available date | ATS dates | Production dates | Comments |
|---|---|---|---|---|
|
2026Q1v1.0 |
06/27/2025 | Not Valid in ATS | Not valid in production | |
|
2026Q1v2.0 |
07/16/2025 | Start: 10/14/2025
End: 11/01/2025 |
Not valid in production | Business rule change page available 08/14/2025 |
| 2026Q1v3.0
2026Q2v3.0 |
09/25/2025 | Start: 11/02/2025
End: 12/06/2025 |
Not valid in production | |
| 2026Q1v4.0
2026Q2v4.0 |
11/06/2025 | Start: 12/07/2025
End: TBD |
Start: 01/13/2026
End: TBD |
*Note: The available dates are projected and subject to change. The version numbers may not be immediately available. Please check the schema and business rule page for any updates.
94xX online signature PIN registration application
| Version | Available date | ATS dates | Production dates |
|---|---|---|---|
| CUv3.0 | 05/17/2018 | Start: 10/29/2018 | Start: 01/08/2019 |
Form 9465
| Version | Available date | ATS dates | Production dates |
|---|---|---|---|
| CUv28.0 | 07/16/2025 | Start: 10/14/2025 | Start: 01/13/2026 |
| CUv27.0 | 06/06/2024 | Start: 10/28/2024 | Start: 01/25/2025 |
Schemas and business rules for employment tax Modernized e-File (MeF) forms
Modernized e-File (MeF) program information
Tax year 2026 schemas and business rules for employment tax Modernized e-File (MeF) forms