Respected Sir,
One of may clients has come in excise in the month of Aug-12 as he was taking the benefit of notification, no. 8/2003 now as he has come in the mid-quarter of the second quarter of f.y.2012-13 he has to file ER-3 in the month of october-12 but from oct-12 he can file ER-1 or he will be liable to file e ER-3 .