NO , please don't do this mistake you can't change the choices after final submission till last round counseling .So in registration process they asks your choice are you want a fee waiver seat if you choose yes then the fee waiver option will be open for you during choice filling but if you choose no option then from here you will not be eligible for fee waiver seat in any round of councelling even during choice filling there will be no option for fee waiver seat.So be alert while councelling .Best of luck.