Hello,
Chandan,just for your reference .
Create an new order type, new billing type
In order type :-Order-rel.bill.type use the new billing type created.
Create a new billing plan type:-enter the start data,end data and horizon for the billing type.
next bill data as 53 for monthly. and save it
then define date description.
in define date categories define the new billing plan type with date category save it
then assign this newly created billing plan in the Sales order type defined.
and assign the billing plan to the item categories.
create new material with item category group LIES and
item category TAD to be used
use above steps.
thanks.