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 2290 for Tax Year 2021. Form 2290 Schemas and Business Rules Distribution 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. Refer to the Release Memorandum for 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 2290 can be found on the Modernized e-File (MeF) Assurance Testing System (ATS) page. Extensible Markup Language (XML) Schemas, Business Rules, and Release Memorandum — 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 Tax Year 2021 2290 MeF Accepted Forms and Schedules PDF Tax Year 2021 2290 MeF Return Due Date PDF Modernized e-File (MeF) Stylesheets Tax Year 2021 Known Issues and Solutions XLSX - Revised 03/26/2024 Release Memo Schema Version ATS Date Production Date Comments 07/22/2021 2021v2.0 Start: 09/02/2021 End: TBD Start: 09/02/2021 End: TBD Business Rules Change Page dated 11/13/2023 Business Rules Change Page dated 09/02/2021 Form 9465 Version Date Available ATS Date Production Date CUv26.0 11/13/2023 Start: 12/17/2023 End: TBD Start: 01/29/2024 End: TBD CUv27.0 07/18/2024 TBD TBD Valid XML schemas and business rules for Form 2290 Modernized e-File (MeF)
