If I want to send my wife back to India [she’s only here for one year, I applied her as a spouse after we marry] what I have to do?

Your wife is not a pair of shoes to be returned. If she is now here on a green card and the two of you wish to divorce, you can file for divorce and it will be up to her where she wants to live.

I suggest reviewing everything with an experienced Immigration Attorney to review your intentions and guide your family correctly. The money spent may well be worth it. Immigration is Federal law so any qualified attorney should be able to assist.