This Brazil POS plugin will prevent a user of more than one discount at the Point of Sale for a transaction.
How To Enable?
In the POS, navigate to POS Settings -> Plugins, search “No discount stacking”, and enable the plugin.
How it works?
If a user will try to apply multiple discounts at the same time, for example automatic promotion and manual discount, then he/she will see a yellow banner “Removing discount from product with applied promotion”, indicating that there is another discount already applied to the cart.