Self Assessment technical specifications (2016): individual returns
Individual returns technical specifications for Self Assessment Online software developers.
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Individual returns technical specifications for software developers working with the Self Assessment online service.
Updates to this page
Last updated 2 March 2017 + show all updates
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Updated document exclusion version 5.0 (27 January 2017) added.
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New documents added for Stage 13 (payments on account) tax and National Insurance contributions calculation version 4.0 (8 July 2016), test case generator version E12.1 (8 July 2016) and exclusions version 4.0 (13 July 2016).
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All documents updated for the 2015 to 2016 tax year.
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Attachments added to the page.
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First published.