The increase in the Child Tax Credit is effective on your 2021 tax return that you will file next year. A child born in 2021 can only be added as a dependent on a 2021 tax return, not a 2020 tax return.
The IRS is working on adding ways to update your status for an advance of the child tax credit to be paid monthly in 2021.
Go to this IRS website for information - https://www.irs.gov/newsroom/irs-sending-letters-to-more-than-36-million-families-who-may-qualify-fo...
