Please follow the below steps to deactivate unused ledger account:
Step 1: Login to ADDA -->> Admin -->> General Ledger.
Step 2: Select "Chart of Accounts" Tab.
Step 3: Select the relevant head Assets / Liabilities / Income / Expense.
Step 4: Click on the "De-Activate" button on the respective account row.
Step 5: Cross Check:
A. On the same screen, Under the "Deactivated expense/income/asset/liability Accounts" section, you will find the accounts which are already deactivated for cross-checking.
B. Also, you will be able to see, deactivated accounts under which entries are present. For these accounts "Delete" Button is disabled since deleting such accounts is not advisable.