Please help on income tax. Is it necessary to show alimony received?

I divorced this financial year and received one-time alimony from my ex. I am a working woman and demanded the money becase my ex understand only the language of money. It is my understanging that onetime alimony is not taxable. If this is correct, do i need to show it in my tax return. I dont want to show if that is valid? Anybody with good knowlege on Indian IT, please answer this question. Thank you.