The following links provide information and technical guidance for software developers and transmitters who are interested in developing software for the Modernized e-File Forms 1065/1065-B. You will find the XML Schemas, Business Rules, and other useful information separated by tax year. Form 1065/1065-B Stylesheets can be downloaded for use in displaying XML tax return data. Production & Acceptance Testing System (ATS) - Current Valid Schemas Tax Year Form Type 2020 Form 1065 2019 Form 1065 2018 Form 1065 2017 Form 1065/1065-B Back to Modernized e-File (MeF) Schemas and Business Rules page
