19 April 2012
Yes. You have to obtain a certificate of interest showing that you have taken a loan from him for purchasing a house and certifying the interest amount paid till 31st March. .
20 April 2012
Yes. Interest is deducted while calculating income from HP. As explained by sir, u need to get interest paid certificate. U can claim total interest if it is LO or upto Rs. 150,000 if self occupied.