The IIT JEE examination 2012 forms were made available online from 31st October, 2011 and registrations were active till 10th December, 2011 while the offline forms were made available from 11th November, 2011 and registrations were active till 5th of December 2011.
I understand that this is the time when your child must be rushing through the last minute preparations. As an IITians I would like to suggest him/her to try the online test series of AskIITians. These are research materials compiled by Ex-IITians only.
For, IIT JEE 2012 forms and registration.
For, AskIITians Online Test Series.
Sunil Kumar, IIT-D