Guidance

Self Assessment technical specifications (2018): generic documents

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

Documents

Transaction Engine: support for software developers

How to use the test service version 1.0 (19 December 2017)

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HMRC(IR) mark: support for software developers

Test in live information version 1.0 (19 December 2017)

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Acceptable characters version 1.0 (19 December 2017)

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Copy declaration version 1.0 (1 December 2017)

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Attachments recognition version 1.0 (13 February 2018)

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Details

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

Published 15 January 2018
Last updated 6 September 2018 + show all updates
  1. Non form validation rule document updated.
  2. Attachments recognition version 1.0 has been added to the page.
  3. First published.