The tables below provide links to the tax year 2023 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 2023 documents Tax year 2023 94x MeF accepted forms and schedules PDF Tax year 2023 94x MeF ATS information Tax year 2023 94x MeF forms and attachment list XLSX Tax year 2023 94x MeF return due dates PDF Tax year 2023 94x MeF stylesheets Tax year 2023 known issues and solutions XLSX – Revised 09/17/2024 Tax year 2023 Form 94x (annual forms) Version Available date ATS dates Production dates Comments 2023v3.0 4/18/2024 Start: 06/02/2024 End: TBD Start: 06/16/2024 End: TBD Business Rules Change page dated 10/10/2024 2023v2.0 11/13/2023 Start: 12/17/2023 End: 06/01/2024 Start: 01/16/2024 End: 06/15/2024 Business Rules Change page dated 02/08/2024 Business Rules Change page dated 12/28/2023 2023v1.0 06/08/2023 Start: 10/23/2023 End: 12/16/2023 Not available for Production Business Rules Change page dated 08/30/2023 Business Rules Change page dated 07/20/2023 Tax year 2023 Form 941x (quarterly forms) Version Available date ATS dates Production dates Comments 2023Q1v2.1 2023Q2v2.1 2023Q3v2.1 2023Q4v2.1 02/09/2023 Start: 03/05/2023 End: TBD Start: 04/01/2023 End: TBD Business Rules Change page dated 12/28/2023 2023Q1v2.0 2023Q2v2.0 2023Q3v2.0 2023Q4v2.0 11/14/2022 Start: 12/11/2022 End: TBD Start: 04/01/2023 End: TBD 2023Q1v1.0 2023Q2v1.0 2023Q3v1.0 2023Q4v1.0 07/21/2022 Not available for ATS Not available for Production 94x online signature PIN registration application Version Available date ATS dates Production dates CUv3.0 05/17/2018 Start: 10/29/2018 End: TBD Start: 01/08/2019 End: TBD Form 9465 Version Available date ATS dates Production dates CUv26.0 11/13/2023 Start: 12/17/2023 End: TBD Start: 01/29/2024 End: TBD CUv27.0 06/06/2024 Not valid in ATS Not valid in production Schemas and business rules for Employment Tax Modernized e-File (MeF) forms Modernized e-File (MeF) program information
