That throws more light on your problem. Retroactive claims are no longer allowed for earned income credit (EIC), child tax credit (CTC) or American Opportunity Tax Credit (AOC) for any taxable year for which the taxpayer has a taxpayer identification number that has been issued after the due date for filing the return for such taxable year. That is, a taxpayer who files a return with an ITIN and later receives a SSN may not amend prior year return to claim EIC or amend a prior year return to claim CTC or AOC for a dependent who later received an ITIN or SSN.
reference: <a rel="nofollow" target="_blank" href="
http://www.thetaxadviser.com/newsletters/2016/jan/congress-makes-changes-to-popular-tax-credits.html...>
