hi all i am sorry but I somehow cant find an answer for this or i am just lost 
i wanted to assign no discount to certain items so when its on total bill the discount wont deduct the price of the items. is there any possible and simple way to edit the item it self to no discount? thank you in advance! 
Mappings if thatโs what your referring to are always positive so you can only map to items not exclude.
You alternative is to automate updating of a fixed value calculation using a report expression where you calculate the ticket total of orders with expression to exclude item tag, state or however you want to work.