In the credit control section we have entered the settlement discount and payment due by, yet this is not followed through automatically to the payment screen, so each discount has to be entered manually, along with ticking the box to say it includes VAT, there could even be a box at the top for all discounts in the payment to be inclusive of VAT rather than individually. Or in the credit control as a default that feeds through to payments. Then if the box was ticked, you could then go through all the invoices using F3 payment in full and the discount would automatically be applied, including VAT.