No VAT scheme, but bills that split VAT out - can't add VAT so have to manually calculate the total amount

I am not VAT registered so am set up that way in ClearBooks, but I have employee expense bills to enter that are from a wholesaler. The bill is excl. VAT per line item, and then a total VAT on the whole invoice. In order to enter these correctly I need to manually add VAT to each line item and apportion to the correct account as on the Bill Entry screen the drop down to select a VAT scheme for the item cannot be changed from "NO VAT"

Question: Should this be selectable on the Bill Entry screen so that the expense is entered 'inclusive of VAT' to the full amount? or am I stuck with the manual calculation and hence having the paper receipt not tally in an immediately obvious way?