I am a UK taxpayer and understand that if I pay less Income Tax and/or Capital Gains Tax in the current year than the amount of Gift Aid claimed on all my donations it is my responsibility to pay any difference. Please notify the charity or CASC if you: Want to cancel this declaration, change your name or home address or no longer pay sufficient tax on your Income and/or Capital Gains. If you pay Income Tax at the higher or additional rate and want to receive the additional tax.