UncategorizedCalculate interest and penalties for tax years ending 5 April 2006 to 5 April 2024 Use this form to work out interest and penalties for tax years ending 5 April 2006 to 5 April 2024. Calculate tax, interest and penalties for the tax years ending 5 April 2010 to 5 April 2024 Guidance: Community Amateur Sports Clubs detailed guidance notes