yes it is possible u can do IPCC wothout coaching.if u do work hard.i m not satisfied with rahul bansal that u must have coaching for INCOME tax. my friend just have cleared PCC without income tax coaching.the must thing is that resd best book and use net for notes.give proper time to ur study.BEST OF LUCK
nothing is imposible dude...prove it n let mak ur name so that in future people will take ur name n will give example of u dat he did it on his self basis...