Prelim calculation of my tax returns, I used a hypothetical ITIN/SSN for my kid (3XXX). When I updated with the actual ITIN (9XXX) the return dropped a lot. Any idea why?

[Opus 17 · Accepted solution]

Certain child tax credits are only allowed with an SSN (citizen or permanent resident).  ITINs and SSNs follow particular numbering patterns and TurboTax knows the difference.  

[vinidelvechio]

So, you are saying that if we use a number that starts with 3 turbo tax is doing one calculation, if we use a number starting with 9 the system does another? Is that correct? What are the differentiation? Which credits are considered for a SSN that is not considered for an ITIN?

[xmasbaby0]

You cannot get the child tax credit unless the child has a SSN. If the child has an ITIN you get the $500 credit for other dependents instead of child tax credit.

[vinidelvechio]

Thanks. That's clarifies my doubt! Have a great day!