Confusion with schedule fa

Its A3.

Cost of buying = 0, is RSU or X% (e.g 15%) less than FMV for ESPP

Last column is total gain.. That is, including capital gain you would have made after vesting.

Capital gain alone need to be show in Schedule CG.

I am not a CA.. just in the same boat as you.. and above are my best guess

0 cant be right because whenever you will sell for RSUs, you will be calculating gain from FMV as you must have paid perquisite on FMV. 

What is second last column in this? Should it then be 0 or NA?

Also, earlier table A used to be of bank account. Now, that has been broken down and we get A3. How is A3 related to bank accounts? 

If you read definition of Table B, then that looks that can also fit the bill because it says it has to be filled by those "any other entity in which the resident assessee owns, directly or indirectly, any voting power or equity interest or assets or interest in profits."... Here again, it says equity interest just like A3. 

So, A3 vs table B is a major issue. Till last year, there were many articles suggesting to fill in Table D but the rigid dropdowns in D make it unsuitable. Dropdowns in Table B are suitable but the only issue is what is A3 for then?

A3 - "Details of Foreign Equity and Debt Interest held". Nothing to do with Bank.. So RSU/ESPP goes here..

Date of acquiring the interest - Date of vesting

Initial value of the investment - 0 for RSU. Because, A3 does not distinguish between perquisite vs capital gain. Section "D" does this. So you may also use column "D" instead of A3

Total gross amount paid/credited with respect to the holding during the period  - Transaction cost, wiretransfer cost etc

Total gross proceeds from sale or redemption of investment during the period - Total sale value. i.e not just the gain. Unlike column D ( which ask about "income" ), A3 ask about total gross value.. which is nothing but sale price.

A3 also does not ask under which section tax is offered. 

Can someone explain in detail the technicalities in a FDI?