80d deduction

IM DOING CA

IM ALSO FILING MY RETURN

BUT IT IS SHOWING ONLY 50000-60000

NOW I BUY THE MEDICLAIM POLICY , FOR SAVING THE TAX THE CHEQUE IS GIVEN FROM MY BROTHER IN LAW'S A/C

SO CAN I CLAIM IT IN HIS FILE U/S 80D OR I HAVE TO CLAIM IN MY FILE ONLY

BECAUSE THE INCOME OF MINE IS BELOW TAXABLE LIMIT BUT MY BROTHER IN LAW'S INCOME IS VERY HIGH APPX 500000/- SO IN THAT I WILL SAVE TAX FOR HIM