How can I open Sub-Ledger in Tally.Erp9

Hello,
Any one help me to open Sub-Ledger in Tally.ERP9 . I want to maintain ledger like bellow:

Abc Ltd. (Head Office) ------------- Mail Ledger
Abc Ltd. (Agra) ------------- Sub Ledger of Abc Ltd. (Head Office)
Abc Ltd. (Kanpur) ------------- Sub Ledger of Abc Ltd. (Head Office)
Abc Ltd. (Lucknow) ------------- Sub Ledger of Abc Ltd. (Head Office)

 

Create Group named : Abc Ltd. (Head Office)
Create Ledger named : Abc Ltd. (Agra) Select Abc Ltd. (Head Office) as under group
Create all ledger same

 

You cannot open sub-ledger in Tally.
Sub Group can be opened.