Guidance

Self Assessment technical specifications (2018): individual returns

Use this technical documentation for individual returns if you're a software developer working with the Self Assessment Online service.

Documents

Self Assessment Individual RIM artefacts version 2.0 (12 December 2017)

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Tax and National Insurance contributions calculation version E1.10.2 (15 December 2017)

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Stage 13 (Payments on Account) Tax and National Insurance contributions calculation version 1.0 (25 October 2017)

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Test case generator version E1.10.3 (12 December 2017)

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MTR mapping document version 1.0 (15 January 2018)

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Exclusion cases version 0.2 (5 April 2018)

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Details

Individual returns technical specifications for software developers working with the Self Assessment online service.

Published 15 January 2018
Last updated 11 April 2018 + show all updates
  1. Exclusion cases version 0.2 has been added to the page.
  2. MTR mapping document version 1.0, Special cases version 1.0 and Recognition process version 1.0 have been added to the page.
  3. First published.