You can delete an account in the "Accounts or Contacts".
Delete an Account
- Click on “Accounts or Contacts”.
- Click the view option - Card View
- Click on the particular account to select it (the account turns dark-blue).
- Click the "Delete" button within the menu.
- Click "Yes" to confirm the deletion.
Note: The accounts that are linked to opportunities cannot be deleted. You will have to un-link the opportunity first, before the account deletion.