Leased out house property

help me out pls
how to take for tax on leased house property. House is given for lease for 12 lakh for 3 years
Will it has to be taken for income under house property. how n how much to take as income under income from HP. leased house property taken on loan.
D same owner of the above lease house property is in rented house can he claim for HRA

Thanks in advance