Excel Based Calculator for CG on Shares & Mutual Funds

There is always a great need for service class people to correctly calculated their tax liability on shares trading in term of short term or long term gain or loss and deposit the correct tax on time. I found it necessary to have something like excel based calculator for monitoring and calculating the tax on the same. If someone has made it for his personal use or otherwise, I request him to share the same with necessary instructions.

regards