Am I eligible for Child Tax Credit despite that we lived 5 months in the US in 2021? If no, are there any exceptions?

You still qualify for up to $3,000 or $3,600 for each qualifying child, but the refundability of your Child Tax Credit will be limited.

The refundability of your credit is limited, similar to the 2020 Child Tax Credit and Additional Child Tax Credit. This means that when your Child Tax Credit is more than your tax liability, your ability to claim any Additional Child Tax Credit more than your tax liability is limited in two ways.

• You must have earned income in 2021 or, if you have three or more qualifying children, have paid some Social Security taxes in 2021. The Additional Child Tax Credit increases when your earned income is higher.
• The Additional Child Tax Credit cannot be more than $1,400 per qualifying child.

Filing Season 2021 Child Tax Credit Frequently Asked Questions