The IRS will be sending taxpayers who received Advanced Child Tax credit payment/s in 2021, the letter will be sent out January 2022, Notice 6419. This letter will show the total amount of payments received. The client can also see their payments in their CTCUp Portal.
IRS General Information on Child Tax Credit
UltimateTax recommends getting the letter from your client before preparing a return or getting a printout from the client’s portal.