Guidance and regulation

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Check if you can use the HMRC Corporation Tax online filing service

Find out if you can use the free online filing service to file your Company Tax Return with HMRC and accounts with Companies House.
- From: HM Revenue & Customs
- Updated: 1 April 2022
Corporation Tax: penalties

Find out when your company may be charged a Corporation Tax penalty and how they are calculated.
- From: HM Revenue & Customs
- Updated: 1 January 2007
Reporting COVID-19 grants and support payments

If you operate as a business, find out if you need to include a COVID-19 grant or support payment on your tax return.
- From: HM Revenue & Customs
- Updated: 16 September 2023
XBRL tagging: when, what and how to tag

Find out information about iXBRL data tagging and taxonomies with practical examples.
- From: HM Revenue & Customs
- Updated: 20 February 2020
Notices under Schedule 7A of the Taxation (International and Other Provisions) Act (TIOPA) 2010

Notices under Schedule 7A of the Taxation (International and Other Provisions) Act (TIOPA) 2010 that have the force of law.
- From: HM Revenue & Customs
- Updated: 25 August 2022
Company Tax Return taxonomies accepted by HMRC

Find out about which version of a taxonomy you should use to file a Company Tax Return.
- From: HM Revenue & Customs
- Updated: 24 April 2024

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