On child credit when adding SSN for dependent, a help link that appears to be incorrect for 2018. Q: What if I've applied for, but haven't received an SSN or ITIN?

[user58502]

2018 IRS rules appear to explicitly require SSN to be included with filing before deadline.

[MichaelMc]

No, not quite. While SSNs must be issued before the due date of your tax return (including extensions), ITINs or ATINs (which are subject to a more time-consuming application process) must be issued or applied for before the due date of your tax return (including extensions).

• A new requirement this year is that each qualifying child dependent must have a Social Security Number, issued before the due date of your tax return (including extensions) to be claimed for the Child Tax Credit.

• A new requirement this year is that each qualifying relative dependent must have a Social Security Number issued before the due date of your tax return (including extensions) or an ITIN or ATIN issued or applied for before the due date of your tax return (including extensions) to be claimed for the Credit for Other Dependents.