If you are Bombay and your refund has not received than it might be possible that its return undeleivered ,bombay income tax deptt has given refund undelivered on his site so if you want to check your name in that list click link given below
Check How to got reissued Refund cheque in case of change of address
Check How to got reissued Refund cheque in case of change of Bank details /Incorrect bank details .
check Bombay undleivered refund status
for the Assessement year 2003-04,2004-05,2005-06,2006-07
If you want to View your Tax deposited/Collected/deducted online(panledger)(form 26as) click here