jus calculate the salary u did get till nov...all the other incomes lyk interest or dividend frm shares etc...and if it comes up above the slab rate of 150000...u'l hav to file the tax return...!!!but hey even if it dosn't reaches 150000 mark u better fyl cos u'l b entitled 4 a refund on the tds collected by ur employer..
and as 4 the question how do i do it...betta u consult a CA since ur abroad ryt now...!!
