s 124 Supplementary
(1) A claim for property loss relief against general income must be made on or before the first anniversary of the normal self-assessment filing date for the tax year specified in the claim. (2) If a loss has previously been carried forward under section 118, the claim must be accompanied by the amendments of any return made under— (a) section 8 of TMA 1970, or (b) section 8A of TMA 1970, that are necessary to give effect to section 118(5) (reducing the amount of the loss carried forward (if necessary, to nil)).