Self Assessment technical specifications (2017): generic documents
Use this technical documentation for individual returns if you're a software developer working with the Self Assessment Online service.
Documents
Details
Returns technical specifications for software developers working with the Self Assessment Online service.
Last updated 16 January 2018 + show all updates
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New version of the 'how to use the test services' document added.
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Update to 2017 generic Self Assessment technical specifications.
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First published.