I need to amend my 2021 taxes for my child tax credit but I can’t remember what form they told me I need.

[DoninGA]

Schedule 8812, Credits for Qualifying Children and Other Dependents

See this TurboTax support FAQ for amending a tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...

[xmasbaby0]

If you are amending for child tax credit for a 2021 return, remember that the IRS sent you letter 6419 about any monthly advance child tax credit payments you received between July and December of 2021---and if you filed a joint return they sent the letter to each spouse.  You have to enter the amounts received for those advance payments if you got those.