Hi Krishna,
I am trying to implement the same scenario in my project. Can you please help me how did you achieve this requirement. Also, I would like to know what all license related information are you entering at the time of GR.
Are you also tracking amount of import or custom duty that you have debited against a particular license. I mean, if my license allow me to take exemption of Rs. 100 and I have already used Rs. 60 by using that license, are you tracking this feature also.