Tax implications on Sale of Shares received from Employer by RSU and ESPP

Hello Experts, 

I have gone several blogs to understand the Tax implications of Sales of shares allotted by employer through RSU's and ESPP.  The employer is a USA company. 

I would like to know as of today (10th Nov 2020), if i sell all my RSUs and ESPP's what will be my tax implication and will this be calculated and declared in ITR (which form and which section)? 

Some blogs  related 2011, mentioned that the sales of shares will be declared as LTCG/ STCG and some blogs say we have to go through DTA agreement with USA.

Appreciate if you could reply and clarify my query.

Regards, 

mg