Income Tax Department — Tax not paid

Address:	Mumbai City, Maharashtra, 400004
Website:	Income tax

Hi sir,
I want to highlight some details to income tax...
I stay in old Mumbai where the property is in Pagadi System. My neighbour had sold property to my Makan Malik at 90 Lacs Rs out of which he had received 50 Lacs in cash and Remaining in cheq, they have not paid any taxes to income tax on any of either. The Makan Malik is selling flats without changing names of the seller to some other buyer to not to pay taxes to government. I want to give notice of this to income tax because previously also he had done such cases. Makan Malik is having small shop in that area. How can he pay such a big amount in Cash after demonetisation. Please find the details..
Makan Malik Name – Lalji Chaurasia
Address of property which is sold – 1st Carpenter Street, Hira Laxmi Building, Building Number 8, 1st Floor, Room Number 9 and 10, Near Gulalwadi Circle, Mumbai – 400004.