25 June 2011
It has rightly been pointed out that it can be any form. It depends on the other incomes in addition the salary. It can be House Property, it can be interest, it can be business income, it can be capital gains so on and so forth.
Kindly intimate whether only income from salary or there is any other income is earned by you.
26 June 2011
I believe the salary is received by cheque and is kept in savings account which has earned some interest. Kindly check and then revert back