Deductions & credits

You have three years from the original due date to file an amendment and claim a refund.  If you are not claiming a refund, then there is no limit to when you can file an amendment.

 

The child will need a social security number or ITIN in order to be claimed as a dependent.  You can find more information on how to obtain an ITIN here:  How do I apply for an ITIN.