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Use form PRT60A to claim exploration and appraisal expenditure incurred before 16 March 1983, if you're a participator in an oil field.
Use form PRT80 to transfer an oil field from one participator to another for Petroleum Revenue Tax (PRT).
Use form PRT65 to elect the participator in the receiving field for a cross-field allowance election.
Use supplementary pages CT600B (2012) Version 2 if your company held an interest of 25% or more in a foreign company controlled from the UK and for reporting bank levy.
Use supplementary pages CT600C (2006) Version 2 if you are claiming or surrendering relief under group or consortium or unrelieved foreign tax provisions.
Use supplementary pages CT600D (2006) Version 2 if your company has been involved in Overseas Life Assurance Business (OLAB).
Use form CT600 (2007) Version 2 to file a Company Tax Return for accounting periods ending on or after 1 April 2004, up to and including 31 March 2008.
Use supplementary pages CT600G (2006) Version 2 if your company is claiming relief under the Corporate Venturing Scheme (CVS).
Use supplementary pages CT600F (2006) Version 2 if your company operates ships and is a party to a Tonnage Tax election.
Use supplementary pages CT600I (2012) Version 2 if your company carried on a ring fence trade for any period beginning on (or deemed to have begun on) 17 April 2002.
Use CT600 Budget Insert (2007) for an overview of the main Budget 2007 changes affecting Corporation Tax.
Use Collective Investment Schemes form CISC8 to apply for approval as an investment trust for accounting periods commencing 1 January 2012 or later.
Use form R105 (AIF1) if you're a non-resident individual or company entitled to interest payments from Authorised Investment Funds (AIF) without Income Tax deductions.
Use the Collective Investment Schemes form CISC6 to apply for entry into the Tax Elected Fund (TEF) regime if you're an Authorised Investment Fund (AIF).
Use form R105 (AIF3) where interest distribution to a non-resident is made to someone other than the trustees of an Authorised Investment Fund.
Use Collective Investment Schemes form CISC11 to apply for unauthorised unit trust exempt status to HMRC.
Use Collective Investment Schemes form CISC12 to send your annual report for an exempt unauthorised unit trust to HMRC.
Use this form if you're a Junior ISA manager and need to send an annual statistical return of subscriptions information to HMRC.
Use this form if you're an ISA manager and need to make an annual market value return of statistical information to HMRC.
Data reporting template for period 1 January to 31 March 2026, with guidance for child health information services (CHIS).
Do not include personal or financial information like your National Insurance number or credit card details.
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