In section 815 (b), I must complete an amount for the net gain to be charged at 25% - not sure re figure to include here because the amount of CGT which I actually paid last year was 1/10th of the 25% amount since I had lived in the property as my PPR for 8 years - my worry is if I insert the figure of 25% of the net gain, the revenue will not know why I paid a much lesser amount - do I explain in a cover letter? I would be very grateful if someone could please clarify? Many Thanks