The tables below provide links to the Tax Year 2017 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 2017 Documents Tax Year 2017 94x MeF Accepted Forms and Schedules PDF Tax Year 2017 94x MeF ATS Information Tax Year 2017 94x MeF Forms and Attachment List (XLSX) XLSX Tax Year 2017 94x MeF Return Due Dates PDF Tax Year 2017 94x MeF Stylesheets Tax Year 2017 Known Issues and Solutions (XLSX) - Updated 10/31/2018 XLSX Tax Year 2017 Form 94x (Annual Forms) Version Available Date ATS Dates Production Dates 2017v3.1 12/27/2017 Start: 01/07/2018 End: TBD Start: 01/08/2018 End: TBD 2017v3.0 09/27/2017 Start: 10/30/2017 End: TBD Start: 01/08/2018 End: TBD Tax Year 2017 Form 941x (Quarterly Forms) Version Available Date ATS Dates Production Dates 2017v4.0 11/10/2016 Start: 12/12/2016 End: TBD Start: 04/01/2017 End: TBD 94x Online Signature PIN Registration Application Version Date Posted 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 CUv21.0 07/23/2019 Start: 11/04/2019 End: TBD Start: 01/07/2020 End: TBD CUv20.0 10/17/2018 Start: 12/09/2018 End: 10/15/2019 Start: 01/08/2019 End: 01/06/2020 Schemas and Business Rules for Employment Tax Modernized e-File (MeF) Forms PageModernized e-File (MeF) Program Information Page
