80c missed in the itr filing

Dear Friends,

     This is paramesh from Visakhapatnam. In my ITR i m forgetted to claime 80C deduction and filled my return. For that im received  143(1) Intimation. Immediately i found what happend and fillied recitifed ITR. Now i received a mail regading rectification not accepted by Department and transfered my case to AO. So friends please tell me can i claim 80C deduction???? what should i do now????

Please reply me urgent

Thank u in advance.