I accidentally added a duplicate customer, resulting in two separate ledgers for one customer. I am unable to find out the exact outstanding balance for this customer

We suggest you to please merge the customer, this will help you by merging the ledger and showing the total exact outstanding balance.

Step 1: Go to “Customers” and select the " Secondary Customer" which you want to merge.
Next, click on “More Option” and click on “Merge”.

Step 2: Select “Primary Customer”.

Step 3: Enter “Merge” and click on “Merge”.

Please Note: The primary customer will be shown under the customer dashboard.