TDS ON PROPERTY BUYING

A bought a property worth more than 50 lakhs. He paid 20 lakhs on his own and deducted tds on the said amount and he took loan of remaining 30 lakhs from bank. Now what will be the procedure to deduct tds on that remaining 30 lakhs as the said amount will be disbursed by the bank directly to the builder ? ( A deducted tds only on 20 lakhs at the time of paying that amount to the builder)