Section 585: Income charged under section 583
2279.This section sets out the amount charged to tax under section 583. It is based on sections 69 and 531 of ICTA. There is no exclusion for sums calculated under the remittance basis by section 832 of this Act because, under the source legislation, income from the disposal of know-how is charged under Schedule D Case VI (to which the remittance basis does not apply).
2280.Subsection (3) ensures that expenditure may be deducted only once under this section and does not permit a deduction if relief has been obtained for the expenditure elsewhere (for example, as trading expenditure or by way of an allowance under CAA).
2281.Subsection (4) contains a signpost to section 603 of this Act which deals with contributions to expenditure. This is necessary because section 532 of ICTA treats section 531 of ICTA as if it had been contained in CAA.