If you have received an Advance Child Tax Credit in 2021, watch your mail in January 2022 when the IRS will begin sending Letter 6419, which details the total amount of advance CTC payments that were disbursed. This letter will be sent to the address the IRS has on file. If you have changed your mailing address, you can update it using the Child Tax Credit Update Portal. It’s highly encouraging that you hold on to that letter in case it’s needed when they filing your 2021 taxes next year.
The IRS has also created a FAQ page as it relates to the Advance Child Tax Credit and this can be found here.