2019 Valid XML Schemas and Business Rules for 1120, 1120S, and 1120-F 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 Forms 1120, 1120S, and 1120-F  for Tax Year 2019.

Developers and other Authorized IRS e-file Providers can find information on e-filing returns through MeF in Publication 4163  PDF and Publication 4164  PDF. Directions for Corporations required to e-file can be found through the e-file for Large and Mid-Size Corporations website. Test Scenarios for the 1120 family can be found on the ATS Updates Page.

XML Schemas, Business Rules and 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 and Production.

Form 1120 Schemas and Business Rules 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.

Instructions for accessing the SOR mailbox PDF.

Tax Year 2019 Documents

Form 1120, 1120S, 1120-F links to TY2019 Release Memos

Version Available Dates ATS Dates Production Dates Comments
2019v5.2 10-19-2020 11-22-2020 TBD  
2019v5.1 02-14-2020 03-08-2020 03-22-2020

04-13-2020 and 07-22-2020 Business rule updates provided

09-02-2020 Business rule updates provided
(Available for ATS 11-02-2020)

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 1120/1120S/1120-F and 7004

Modernized e-File (MeF) Schemas and Business Rules