(1)Subject to the following provisions of this section, where a company is assessed or liable to be assessed under section 419 in respect of a loan or advance and releases or writes off the whole or part of the debt in respect of it, then—
(a)for the purpose of computing the total income of the person to whom the loan or advance was made, a sum equal to the amount so released or written off shall be treated as income received by him after deduction of income tax from a corresponding gross amount;
(b)no repayment of income tax shall be made in respect of that income and no assessment shall be made on him in respect of income tax at the basic rate on that income;
(c)the income included by virtue of paragraph (a) above in his total income shall, notwithstanding that paragraph, be treated for the purposes of sections 348 and 349(1) as not brought into charge to income tax;
(d)for the purpose of determining whether any or what amount of tax is, by virtue of paragraph (a) above, to be taken into account as having been deducted from a gross amount in the case of an individual whose total income is reduced by any deductions so much only of that gross amount shall be taken into account as is part of his total income as so reduced.
(2)If the loan or advance referred to in subsection (1) above was made to a person who has since died, or to trustees of a trust which has come to an end, this section, instead of applying to the person to whom it was made, shall apply to the person from whom the debt is due at the time of release or writing off (and if it is due from him as personal representative, within the meaning of Part XVI, the amount treated as received by him shall accordingly be included for the purposes of that Part in the aggregate income of the estate) and subsection (1) above shall apply accordingly with the necessary modifications.
(3)This section shall not have effect in relation to a loan or advance made to a person if any sum falls in respect of the loan or advance to be included in his income by virtue of section 677, except so far as the amount released or written off exceeds the sums previously falling to be so included (without the addition for income tax provided for by subsection (6) of that section).
(4)This section shall be construed as one with section 419.