2016 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 2016.

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

General and program specific testing information for use in completing the Assurance Testing System (ATS) process can be found in the Publication 5078, Modernized e-File (MeF) Test Package Business Submission Assurance Testing System. Test scenarios for the 1120 family can be found on the Modernized e-File (MeF) Assurance Testing System (ATS) Updates page on IRS.gov.

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 is now 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.

Tax Year 2016 Documents

Form 1120, 1120S, 1120-F links to TY2016 Release Memos
Version Available Dates ATS Dates Production Dates Comments
2016v4.2 05-19-2017 06-18-2017 06-18-2017

Business rule updates have been provided on 10-17-2018, 12-27-2017, 12-13-2017, and 09-27-2018

2016v4.1 12-14-2016 12-29-2016 01-06-2017 02-17-17 Business Rule change pages available.
2016v4.0 11-10-2016 12-12-2016 01-06-2017  

Current Valid XML Schemas and Business Rules for 1120/1120S/1120-F

Modernized e-File (MeF) Schemas and Business Rules