@jayapra there could be a few reasons for not getting the credit
1) by far the biggest reason is not selecting 'the entire year' - if you otherwise picked a numbe less than 6, the software will think Baby lived with you for less than 6 monts and would say not eligible for the credit.
2) the tax credit is also income dependent. if your did not earn at least $2500, there would be no credit.
3) if you did not have an SSN issued prior to April 15, 2023, you are not eligible for the credit.
filing an amendment is the way to get the credit, since you already filed.
look at Lines 19 and 28 of the original return - is there anything listed? that is where the credit should be.
