To sell shares from your holdings, Go to "View Order/Trade Reports" and navigate to "View Holdings/Collateral Values"
Similar to buy order, to place a sell order, select the scrip which you wish to sell and click on "Square Off"
Alternatively, if you know the scrip you would like to sell, enter the shortcut key “F2”.
This shall open the sell order entry tab which shall look like below.
Select the share you want to sell, the price at which you would like to sell, etc, and click on "Submit".