I have booked eticket but i want to change boarding station at reservation counter is it possible
No, you can change the boarding station in online mode only by following the steps below.
Login to the same application and with the same IRCTC account through which you have booked the ticket.
After that click on “Booking Ticket History (New)”.
You will be redirected to booked tickets page. Select the ticket for which you want to change the boarding.
Now click on “Change Boarding Point” and select the station from which you want to board the train.
Note: Passenger who has booked eticket can change his Boarding station online before 24 hours of the scheduled departure of the train. If a passenger has changed the boarding point then, he will lose all the rights to board the train from the original boarding point.