2021 XML Schemas and Business Rules for Form 1041 Modernized e-File (MeF)

 

The following links provide information and technical guidance for Software Developers and Transmitters who are interested in developing software for the Modernized e-File (MeF) Form 1041 for tax year (TY) 2021. Included are the Extensible Markup Language (XML) Schemas, Business Rules, Release Memorandum, and specific instructions.

Developers and other authorized IRS e-file providers can find information on e-filing returns through MeF in the Publication 4163 PDF and Publication 4164 PDF. Test scenarios for Form 1041 can be found on the Modernized e-File (MeF) Assurance Testing System (ATS) page.

XML Schemas, Business Rules, and Release Memos - Throughout the year, multiple versions of these documents may be in use at the same time. Special attention should be paid to the Release Memo issue date and the projected start and end dates for Assurance Testing System (ATS) and Production.

Tax year 2021 documents

Form 1041 links to TY2021 schemas, business rules and release memos

Version Available date ATS dates Production dates Comments
2021v4.3 02/09/2023 Start: 03/05/2023
End: TBD
Start: 03/19/2023
End: TBD 

Business Rules Changes Page dated 12/28/2023

Business Rules updates provided 07/20/2022

Schemas updates provided 02/09/2022

2021v4.2 02/10/2022 Start: 03/06/2022
End: TBD
Start: 03/20/2022
End: TBD

Business Rules updates provided 11/14/2022

Business Rules updates provided 06/09/2022 

Business Rules updates provided 04/21/2022 

2021v4.1 11/12/2021 Start: 12/12/2021
End: TBD
Start: 01/07/2022
End: TBD 
 
2021v4.0 10/14/2021 Start: 11/21/2021 
End: TBD
Start: 01/07/2022
End: TBD
 

Current valid XML Schema and Business Rules for 1041 Modernized e-File (MeF)

Modernized e-File (MeF) Schemas and Business Rules