Notice under 148 for the assessment year 2010-11 (U/S 50 C)

Our assessee was allotted a plot from development authority on 31/10/2009, after allotment of said residential plot the assessee entered in a registered agreement on 22/12/2009. according to this registered agreement our assessee received Rs. 150000/- as a advance from the buyer remaining Rs. 150000/ received at the time of registry on 30/03/2010. Total amount received by the assessee Rs. 300000/- on transfer of the said plot. As per terms & conditions of the registered agreement dated 22/11/2009 the remaining installments amounting to Rs. 1200000/- paid to the Development Authority paid by the buyer & buyer paid the same accordingly & at present buyer has possessed the said plot and he also agree to confirm the said transaction . The circle rate of the plot Rs. 1673000/-, selling price mention in the registered sale deed dated 30/03/2010 Rs. 1500000/- our assessee first received a notice from the assessing officer u/s 133(6) dated 01/02/2017 which was complied accordingly later on A.O. issued notice u/s 148 for the assessment year 2010-11 dated 31/03/2017, our assessee not filed any income Tax Return for the assessment year 2010-11. On above mentioned facts my quarries are as under :- 1. Which type of tax liability arises on our assessee. 2. 50 C provisions attract to our assessee. 3. Please compute the tax liability. 4. Our assessee only received Rs. 300000/- as a premium amount of the transfer of the said allotted residential plot balance installments Rs. 1200000/ direct deposit by the buyer to the Development Authority this fact clearly mention in Agreement/Sale Deed. 5. The above proceedings u/s 148 of I.Tax Act for the assessment year 2010-11 is legally or not.