TY 2019 Valid XML Schemas and Business Rules for Form 1065 Modernized e-file (MeF)


The links below provide information and technical guidance for Software Developers and Transmitters who are interested in developing software for the Modernized e-File (MeF) Form 1065 for Tax Year (TY) 2019.

Developers and other Authorized IRS e-file Providers can find information on e-filing returns through MeF in the Publication 4163 (PDF) PDF and Publication 4164 (PDF) PDF. Test Scenarios for 1065 can be found on the ATS Updates Page.

XML Schemas, Business Rules and Release Memo - 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.

Form 1065 Schemas and Business Rules Distribution are now distributed through the Registered User Portal and your e-services mailbox. This mailbox is part of the Secure Object Repository (SOR). Users will access their mailbox in their existing e-services account to pick up the schema and business rules packages.

Tax Year 2019 Documents

Form 1065 links to TY2019 Release Memos


Available Date

ATS Date

Production Date


2019v5.2 04-13-2020 06-07-2020 06-21-2020  
2019v5.1 02-12-2020 03-08-2020 03-22-2020  
2019v5.0 12-05-2019 12-29-2019 01-07-2020 01-27-2020 Business rule updates provided
2019v4.0 10-15-2019 12-08-2019 Not Valid for Production  
2019v3.0 09-03-2019 11-04-2019 Not Valid for Production  
2019v2.0 07-23-2019 Not Valid for ATS Not Valid for Production  
2019v1.0 06-11-2019 Not Valid for ATS Not Valid for Production


Current Valid XML Schemas and Business Rules for 1065 Modernized e-File (MeF)

Modernized e-File (MeF) Schemas and Business Rules