Hi @Eve H
If the supplier is not registered for VAT, that over-rides the classification of the goods/services because, if you haven't actually paid VAT on the cost of the goods/services, then you should not be claiming it as Input Tax.
Use Z=0% or Exempt.
Do not use NoVAT code as this will bypass the VAT Return altogether (cost price will not show in box 7).
Hope this helps.
