45606
The following diagnostic is generating:
The taxpayer doesn't have a valid SSN (or ITIN), which disallows the Child Tax Credit and/or the Additional Child Tax Credit.
Solution:
1040 Form Instructions :Child tax credit. If you didn't have an SSN (or ITIN) by the due date of your 2015 return (including extensions), you can't claim the child tax credit on either your original or an amended 2015 re-turn, even if you later get an SSN (or ITIN). Also, no credit is allowed on ei-ther your original or an amended 2015 return with respect to a child who didn't have an SSN, ATIN, or ITIN by the due date of your return (including exten-sions), even if that child later gets one of those numbers. See the instructions for line 52.
