Corporation Tax generic technical specifications
Find guidance for software developers working with the Corporation Tax online service.
- From:
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- Published
- 29 May 2012
- Last updated
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13
24JuneApril20252024— See all updates
Documents
Transaction Engine: Support for software developers
https://www.gov.uk/government/collections/government-gateway-support-for-software-developers
How to use the test service: 1.4a
ODT, 38 KB
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HMRC (IR) mark: support for software developers
https://www.gov.uk/government/collections/hmrcirmark-support-for-software-developers
Corporation Tax online service guidance: 1.6
PDF, 81.7 KB, 16 pages
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Corporation Tax online service validation rules: 1.17a
ODT, 46.5 KB
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Corporation Tax recognition instructions:instructions 1.02023
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Details
Technical specifications for Corporation Tax online services for software developers.
Updates to this page
Last updated 13
-
Removed attachment 'Corporation Tax recognition instructions 2023' and replaced with 'Corporation Tax recognition instructions: 1.0'.
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Update history
2025-06-13 09:36
Removed attachment ‘Corporation Tax recognition instructions 2023’ and replaced with ‘Corporation Tax recognition instructions: 1.0’.
2024-04-24 11:51
Corporation Tax online service validation rules 1.16a guidance has been replaced with version 1.17a because the error message for errors 1611 and 3317 has been updated.
2023-07-12 11:43
Corporation Tax recognition instructions 2023 has been added.
2023-03-31 16:23
The ‘Corporation Tax online service validation rules 1.15a’ guidance has been replaced with version 1.16a because the condition row for error 9043 has been updated. For V2 submissions – check that box 64 agrees with the result of the computation of marginal starting rate or small companies’ relief.For V3 submissions – check that box 435 agrees with the result of the computation of marginal relief.
2023-01-05 09:40
The ‘Corporation Tax online service validation rules 1.14’ guidance has been replaced with a more accessible ‘Corporation Tax online service validation rules: 1.15a’ version.
2022-11-23 15:28
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.