Section 817 | Alternative calculation of profits: income chargeable under Chapter 8 of Part 5
From legislation.gov.uk
(1)This section applies if the individual has qualifying care receipts for the tax year which are chargeable to income tax under Chapter 8 of Part 5 (income not otherwise charged).
(2)The amount charged for the tax year arising from all the arrangements from which the receipts are derived is—
(a)the individual's total qualifying care receipts for the tax year, less
(b)the individual's limit for the year.