Hai , Krishan .

        According to last year process of JoSAA counselling one have to pay 35 k just after the 1st round . Certificate verification process take place after 1st round in which we have to decide freeze or float . It doesnot matter we freeze or float our option we have to pay the fee . And the fee paying process is through netbanking or DD .

        If institute fee exceeds the fee we paid first we have to pay the rest at the time of admission in the institute .

HOPE IT HELPS YOU . GOOD LUCK .