Mr. Nilay,
Thanks for your kind advice. When others said to submit form 15G, you are suspecting that the source of my wife's income for FD. Good.
I have following reasons to prove. The money what she got is gift from me (my income was already taxed at source). Then, she also holds some shares which gives some income to her. now, she has some income from her shares and they are not to the limit to tax. Also, the FD interest is not more than Rs. 20,000/-. So, I feel that she can submit FORM 15G and get exempted from the IT detection at source. If it correct please advice.
With lot of thanks
Kannan