Guidance

Agent authorisation technical specifications: Corporation Tax

Agent authorisation Corporation Tax technical specifications for software developers.

• From: HM Revenue & Customs
• Published: 1 January 2014
• Last updated: 16 June 2023 — See all updates

Documents

CT test case data 1.3

PDF, 46.2 KB, 3 pages

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CT business validation rules: 1.3

PDF, 89.7 KB, 11 pages

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CT valid xml sample: 1.2

XML, 1.8 KB

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Details

Corporation Tax technical specifications for software developers working with the Agent Authorisation Online service.

Published 1 January 2014
Last updated 16 June 2023 + show all updates

1. 16 June 2023

   CT recognition process: 1.2 PDF removed.

2. 6 February 2018

   CT recognition process pdf has been updated to version 1.2.

3. 1 January 2014

   First published.