My green card was approved in Sep 2005 but I did not get the Card until Feb 2006. Does USCIS consider the approval date or actual date when card was issued for establishing the five year eligibility period for accepting the N400 application? Also I have a 13 year old son who was born in India, do I need to submit N600 form for his citizenship?
It is the date of approval that counts. For your son, read the instructions on the Form N600. That should tell you what you need to do.