Lumpsum discount in Sales - Chemist can give lumpsum discount in Rs. or Percentage. We’ll update that percentage in all items. NOTE: This lumpsum discount will not applicable on Locked Discount items.
Lock GST in Sales bill. If you lock GST in Sales settings, you can’t edit GST% at time of creating Sales Bill
Go to Profile > Settings > Sales.
Lock Item Discount - If you set discount in item and lock that discount, You can’t not override item discount in Sale Bill. You can Lock Discount from Inventory Listing Page, Item Details Page & Save Set Location Page too.