The IRS started issuing information letters to advance child tax credit recipients in December. Recipients of the third round of the Economic Impact Payments will begin receiving information letters at the end of January. Using the information in these letters when preparing a tax return can reduce errors and delays in processing.

People receiving these letters should keep them. Do not throw them away. These letters can help taxpayers, or their tax professional prepare their 2021 federal tax return.

Advance child tax credit payments letter can help people get remainder of 2021 credit
To help taxpayers reconcile and receive all the 2021 child tax credits to which they are entitled, the IRS started sending Letter 6419, 2021 advance CTC, in late December 2021 and will continue into January. This letter includes the total amount of advance child tax credit payments taxpayers received in 2021 and the number of qualifying children used to calculate the advance payments. People should keep this and any other IRS letters about advance child tax credit payments with their tax records.

Advance Child Tax Credit Payments in 2021 | Internal Revenue Service (irs.gov)

Child Tax Credit Update Portal | Internal Revenue Service (irs.gov)