can we find out the PAN and assessee details through efiling

Ashwini (CA Final student) (78 Points)

25 January 2011  

our firm is a chartered accountant firm. We filed our clients' income tax returns online. And we sent it to banglore through ordinary post. But now we got a mail from IT department that they haven't receive our efiling ackonwledgement yet. And in that mail they just given the efiling acknowledgement number but they didn't give the PAN number. Every year we a lot of returns. So my question is can we find out the PAN and assessee details through efiling acknowledgment..? If so please let me know the procedure.