As long as no transactions have been posted to the account you will be able to delete using the following steps:
Click the relevant ledger (**Sales Ledger**, **Purchase Ledger** or **Nominal Ledger**), then click the relevant option (**Customers**, **Suppliers** or **Trading Partners**).
Locate the account, then click the relevant tab (**Customer**, **Supplier** or **Trading Partner**).
Right-click and select **Modify Record**.
Right Click and select Delete Record.
Select Yes to confirm deletion.
Go to the **Details** tab for the customer or supplier.
Right-click and select **Modify Record**.
Right Click and select Delete Record.
Select Yes to confirm deletion.