Interest and principal deduction for self occupied house

Hi Experts,

Need your guidance in the following subject matter -

The assess brought the flat in 2009 which was just launched by the real estate group by paying the token money. The flat is under construction till date which means the ownership has not been transfered. The assess has paid till 90% of the value of the flat.

He has also taken bank home loan last year. and started paying the EMI. So he wanted to know about the interest and Principal payment deduction available to him under the IT act..

Question ask by him

1) can he get whole interest and principal deduction for the last fiscal year under the IT act. since he paid only 3 EMI has FY so will he get prioportionate deduction in respect of interest. ( means will get maximim amount of interest as 150000/12*3)

Please guide me

Thanks

Mukesh