The tables below provide links to the tax year 2024 release memorandum, extensible markup language schema, and business rules for the Modernized e-File (MeF) 1040 series and extensions. Throughout the year, multiple versions of schema and business rules may be in use at the same time. For each version, the tables below reflect the effective dates in the Assurance Testing System (ATS) and Production System. Tax year 2024 documents Tax year 2024 known issues and solutions Tax year 2024 accepted forms and schedules for individual tax returns and extensions Tax year 2024 form 1040 series and extensions forms and attachments XLSX Tax year 2024 recommended portable document file (pdfs) names attached to 1040 MeF submissions Tax year 2024 Form 1040 series Version Date available in SOR * ATS date Production date Comments 2024v1.0 06/06/2024 Not valid in ATS Not valid in production 2024v2.0 07/18/2024 Not valid in ATS Not valid in production 07/02/2024: Release memo will be associated to versioning closer to the Secure Object Repository available date. Tax year 2024 Form 4868 Version Date available in SOR * ATS date Production date Comments 2024v1.0 06/06/2024 Not valid in ATS Not valid in production Tax year 2024 Form 2350 Version Date available in SOR * ATS date Production date Comments 2024v1.0 06/06/2024 Not valid in ATS Not valid in production Form 9465 Version Date available in SOR * ATS date Production date Comments CUv27.0 06/06/2024 Not valid in ATS Not valid in production Form 56 Version Date available in SOR * ATS date Production date Comments CUv23.1 10/12/2023 11/19/2023 01/29/2024 * Secure Object Repository (SOR)
