Self Assessment technical specifications (2023) for partnership returns
Use this technical documentation for partnership returns if you’re a software developer working with the Self Assessment online service.
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Individual returns technical specifications for software developers working with the Self Assessment online service.
Last updated 5 May 2023 + show all updates
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Special and exclusion cases version 1.0a has been added.
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Special and exclusion cases version 0.1a has been added.
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First published.