Taxation of bhavishya nirman bond

I have purchased NABARD -Bhavisya Nirman Bond on 01.01.2009 for Rs. 8,50,000/-.

Redemption of Bond is done on 31.12.2018 for Rs. 20,00,000/-.

Rs. 4,00,000/- Invested in Capital Gain Bond of REC on 01.02.2019.

How the Tax is to be calculated and How to fill Appropriate coloumn in ITR form.

Kindly Let us know details at the earliest as IT Filing date is approaching on 31.07.2019.