“ 10(1) Where- (a) for any tax year an earner is chargeable to income tax under ITEPA 2003 on an amount of general earnings received by him from any employments (“the relevant employment”), (b) the relevant employment is both – (i) employed earner’s employment, and (ii) an employment, other then an excluded employment within the meaning of the benefits code (see Chapter 2 of Part 3 of ITEPA 2003) (c) the whole or part of the general earnings falls, for the purposes of Class 1 contributions to be left out of account in the computation of the earnings paid to or for the benefit of the earner, a Class 1A contribution shall be payable for that tax year, in accordance with this section, in respect of that earner and so much of general earnings as so falls to be left out of account”
“ Class 1A NIC refunds cannot be made when a subsequent event occurs which may alter the amount on which NICs were originally assessed”
“The error must relate to something which occurred before the date by which payment of the Class 1A NICs must be made”