Guidance

Self Assessment technical specifications (2019) for individual returns

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

From:
HM Revenue & Customs
Published
13 December 2018
Last updated
17 December 2019 — See all updates

Documents

Self Assessment Individual RIM artefacts version 1.1 (16 January 2019)

ZIP, 3.76 MB

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Tax and National Insurance contributions calculation version E2.3.1 (15 November 2018)

ZIP, 191 KB

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Stage 13 (Payments on Account) Tax and National Insurance contributions calculation version 1.0 (18 September 2018)

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Test case generator version E2.3.1 (22 November 2018)

ZIP, 2.95 MB

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MTR mapping document version 1.0 (06 November 2018)

ZIP, 22.1 KB

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Exclusion cases version 3.0 (13 December 2019)

PDF, 281 KB, 12 pages

Special cases version 4.0 (13 December 2019)

PDF, 135 KB, 8 pages

Recognition process version 1.0 (18 February 2019)

PDF, 207 KB, 1 page

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Details

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

Published 13 December 2018
Last updated 17 December 2019 + show all updates

  1. Exclusion cases version 2.0 (4 October 2019) has been replaced with Exclusion cases version 3.0 (13 December 2019) and Special cases version 3.0 (4 October 2019) has been replaced with Special cases version 4.0 (13 December 2019).

  2. Exclusion cases version 1.1 (24 May 2019) has been replaced with Exclusion cases version 2.0 (4 October 2019) and Special cases version 2.0 (24 May 2019) has been replaced with Special cases version 3.0 (4 October 2019)’.

  3. Exclusion cases version 1.0 (25 April 2019) replaced with Exclusion cases version 1.1 (24 May 2019) and Special cases version 1.0 (6 March 2019)’ replaced with Special cases version 2.0 (24 May 2019).

  4. Special cases version 1.0 (6 March 2019) has been added.

  5. Exclusion cases version 1.0 (25 April 2019) has been added.

  6. Recognition process version 1.0 (18 February 2019) added.

  7. Self Assessment Individual RIM artefacts version 1.0 (01 October 2018) has been replaced with Self Assessment Individual RIM artefacts version 1.1 (16 January 2019).

  8. First published.