Guidance

Corporation Tax generic technical specifications

Find guidance for software developers working with the Corporation Tax online service.

Documents

Transaction Engine: Support for software developers

How to use the test service: 1.4a

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HMRC (IR) mark: support for software developers

Corporation Tax online service guidance: 1.6

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Details

Technical specifications for Corporation Tax online services for software developers.

Published 29 May 2012
Last updated 23 November 2022 + show all updates
  1. The 'How to use the test service: 1.4' guidance has been replaced with a more accessible 'How to use the test service: 1.4a' version.

  2. Corporation Tax online service validation rules' version 1.13 has been replaced with version 1.14 to reflect changes to error messages.

  3. How to test services: 1.4 has been updated.

  4. The 'Corporation Tax online service validation rules' version 1.12 has been replaced with version 1.13.

  5. How to test services: 1.3 is updated to version 1.4.

  6. Corporation Tax online service validation rules 1.12 updated to include error code 3321.

  7. Corporation Tax online service validation rules updated to version 1.12 - March 2015

  8. First published.