Hi Pranav
I guess that IC is not being used anywhere in the circuit, anyways even I have worked on the same stuff before and I made use of the following things:
1. RFID reader
2. AT89S52 microcontroller
3. LCD
I did not even use max232 IC; 8051's have the capability of communicating over USART protocol which most of the RFID readers work on. So you just need to read the 12 byte RX data and perform the related tasks.
Hope this helps 