Guidance

Corporation Tax generic technical specifications

Technical specifications for Corporation Tax online services for software developers.

Documents

Transaction Engine: Support for software developers

How to use the test service: 1.4

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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 software developers working with the Corporation Tax online service.

Published 29 May 2012
Last updated 16 January 2018 + show all updates
  1. How to test services: 1.3 is updated to version 1.4.
  2. Corporation Tax online service validation rules 1.12 updated to include error code 3321.
  3. Corporation Tax online service validation rules updated to version 1.12 - March 2015
  4. First published.