Thanks Mani for your reply.
There is no PCC assigned for WHT update type.(and this is same in my legacy 4.7 and working fine but now in ECC6.0 it's showing up differently)
The WHT calculation is fine but only noticeable thing is that in TPM12 the Nominal Amount shown include Interest only while in Positional currency amount it shows up Interest + WHT. Why so? ince only INR is used.Any idea?
Kindly advice...