The following links provide information and technical guidance for Software Developers and Transmitters for the Modernized e-File (MeF) Forms 1040, 1040EZ, 1040A, 1040-SS(PR), 4868, 2350, 9465 and 56. You will find, by tax year, XML schemas, business rules, and other useful information and documents.

Software Testing: Tax Year 2010 test scenarios are provided in Publication 1436.

Stylesheets: Forms 1040 and 4868 stylesheets can be downloaded for use in displaying XML tax return data and are located on the MeF Stylesheets page.

Instance Document: A sample 1040 MeF acknowledgement is provided below.

• MeF Acknowledgement sample - TY 2009
• A Send Submissions sample can be found in Section 4.3.1 of the MeF State and Trading Partners ICD, which is located on the MeF User Guides and Publications page.

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