Do I amend my 2020 return so I can add me newborn to receive child tax credit?

[VolvoGirl]

Not unless your baby was born in 2020.  If he was born in 2021 you can't add him to your 2020 return.

[TaxTim1]

To add to @VolvoGirl's reply, keep checking the IRS website below.  The IRS is working on a portal that will allow you to update information such as a child being born in 2021 which could make you available for an advance payment in 2020 of your 2021 Child tax credit.

https://www.irs.gov/credits-deductions/child-tax-credit-update-portal

Hope this helps.