What if I don't have a state-issued birth record of my son?
Other documents, like his passport, can be used to prove your son's age.
Since the process can take some time, is there a way to claim my child for tax purposes until the process is completed?
Yes, you can contact the Internal Revenue Service and ask them for the form W-7A, Application for Taxpayer Identification Number for Pending U.S. Adoptions.