[A} In order to add all these ledger go to Tally Integration module >> Ledger Settings 

[B] To add round off ledger scroll down and find Input Round-Off Ledger and Output Round-Off Ledger. In here Input is for purchase and output is for sales invoice.

[C] In order to add ledger click on "Add Ledger", a window will slide from right side.
Add ledger name it and click on "Save Details".

[D] In order to add extra charges ledger find Input Additional Charges Ledgers & Output Additional Charges Ledgers and perform same steps as above.

[E] To add ledger for discount find Input Discount Ledger & Output Discount Ledger and perform the same steps above.

Keywords: Add ledger, Tally ledger, Extra Charge ledger