Tax year 2026 schemas and business rules for employment tax Modernized e-File (MeF) forms

 

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 Form 94x (quarterly forms)

Version Available date ATS dates Production dates Comments

2026Q1v1.0

2026Q2v1.0

2026Q3v1.0

2026Q4v1.0

 06/27/2025 Not Valid in ATS Not valid in production  

2026Q1v2.0

2026Q2v2.0

2026Q3v2.0

2026Q4v2.0

 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
2026Q3v3.0
2026Q4v3.0		 09/25/2025 Start: 11/02/2025
End: 12/06/2025		 Start: TBD
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.

94x 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 Not Valid in production
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

 

Page Last Reviewed or Updated: 03-Oct-2025