1)  Module CRM>Contact Book>Leads>Add New (For a new leads)

     Module CRM>Contact Book>Leads>View Lists (For existing Leads)

2)  Click "Convert to Account" at the action column. 

3)  The screen will pop out as below and you can choose the suitable category and click create.  

4)  After that, you can go to Module Accounting>Configurations>Mapping>Accounts (Ind.)

5)  Next, tick on the small box at the first column (If there's a lot of account, just click the first box right at the top of the first column) 

6)  Click "Map" button at the end of the box.  

7)  You can choose the right account to make a changes to Module Accounting and click "Map It!" button to continue the changes.