7(1)The result of “ceasing to be liable” to tax on a qualifying amount depends on the tax (or taxes) in respect of which the amount is untaxed.
(2)For income tax or capital gains tax, the result is that the amount is no longer liable to be brought into account in assessing the income tax or capital gains tax due from P for the tax year in which the amount would otherwise be liable to be brought into account.
(3)For inheritance tax, the result is that any inheritance tax due from P in respect of the chargeable transfer and attributable to the property whose value is included in the amount is no longer due from P.
(4)For VAT, the result is that P is no longer required to account for output tax on the amount in determining the VAT payable by P for the prescribed accounting period in which P would otherwise be required to account for output tax on the amount.
(5)But—
(a)ceasing to be liable to tax on a qualifying amount does not affect P’s liability to tax on any other amount, and
(b)P’s liability to tax on any other amount remains what it would have been, had the qualifying amount been brought into account in calculating that liability.
(6)Accordingly, if the qualifying amount were ever to be brought into account and it were found that the tax assessed on any other amount should have been higher as a result, P would remain liable for the extra tax due on that other amount and for any associated ancillary charge.
(7)For the purposes of sub-paragraphs (5) and (6), the qualifying amount is assumed to form the top slice of the total sum on which P is liable to tax.