Please refer following steps
Step 1 :
Create or update City Ledger Account with Discount Percentage & Check Mark Crate Business Source
Step 2 :
Open eZee Burrp >> Punch one order >> Make Settlement with Posting City Ledger account so it will show pop-up with Apply discount or not.
Step 3 :
Once you click on yes it will apply discount and show that discount amount in Report