(1) No appeal may be made against -
(a) [deleted]
(b) the amount of any income, profits or gains or, as respects capital gains tax, chargeable gains, or the amount of any allowance, deduction or relief specified in an assessment or an amended assessment made on a chargeable person for a chargeable period, where the inspector has determined that amount by accepting without the alteration of and without departing from the statement or statements or the particular or particulars with regard to income, profits or gains or, as respects capital gains tax, chargeable gains, or allowances, deductions or reliefs specified in the return delivered by the chargeable person for the chargeable period, or
(c) the amount of any income, profits or gains or, as respects capital gains tax, chargeable gains, or the amount of any allowance, deduction or relief specified in an assessment or an amended assessment made on a chargeable person for a chargeable period, where that amount had been agreed betw