16 May 2012
It depends upon the nature of income you earn in respect of whom you want to file an income tax return. If you are a salaried person and earn only such income then you can file ITR 1 and if you earn income from house property as well then you can file ITR 2.
16 May 2012
Mention for whom you r filing , the income which are there in the concerned person,whether salaried, PGBP, IOS, Income from House property etc
16 May 2012
It depends upon nature of income for which you are filling your income tax return
I am agree with All above experts in addition to that ITR-4 Is for Business income (Other than Presumptive Income And also there is other type of return for that you have to visit incometaxefilling.gov.in