How do I claim tax rebate on housing loan?

Sir mene ek house greater Noida me apni wife ke naam purchase Kara h Jo ki housewife h aur home loan sanction meri wife ke naam hua jis me me guarantor hu aur usme mere income documents lage h so jo interest certificate of home loan aayega us behalf PE m tax rebate nhi le pauga so bank Wale kah rahe h ki ap kisi tarah co applicant ban jaye to ap ko benefit milega par uske liye mujhe fir se stamp duty deni padegi please koi solution bataiye ap