The following 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 1041 for Tax Year (TY) 2018. Included are the 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 1041 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.
Tax Year 2018 Documents
- Tax Year 2018 1041 MeF Accepted Forms and Schedules (XLS) (11-28-2018)
- Tax Year 2018 1041 MeF Forms Attachment Listing (XLS) (11-28-2018)
- Tax Year 2018 1041 MeF Return Due Dates (PDF)
- Tax Year 2018 Stylesheets: MeF Stylesheets
- Known e-file Issues and Solutions (XLS)
Version |
Available Date |
ATS Dates |
Production Dates |
Comments |
|---|---|---|---|---|
| 2018v5.2 | 02-12-2020 | 03-08-2020 | 03-22-2020 | |
| 2018v.5.1 | 11-26-2019 | 12-29-2019 | 01-07-2020 |
Business Rule Change Page (11-26-2019) 07-22-2020 Business Rule updates provided |
| 2018v5.0 | 11-28-2018 | 12-30-2018 | 01-08-2019 | Business Rule Change Page (02/13/2019) |
Current Valid XML Schema and Business Rules for 1041 Modernized e-File (MeF)