Once you have downloaded the NSE_FMV_31_JAN_2018.xlsx file, follow these steps to compute your tax liability.
Go to NSE Historical Data page:
Most users prefer a static Excel file. Here is a manual extraction of the top 50 NSE stocks as of Jan 31, 2018: Once you have downloaded the NSE_FMV_31_JAN_2018
No. You do not need to attach the Excel file to your ITR. However, you must keep it as a in case the Income Tax Department issues a scrutiny notice (Notice under Section 143(2)). You will have 7 years from the end of the relevant assessment year to produce this evidence. Once you have downloaded the NSE_FMV_31_JAN_2018