If you are wanting to unenroll for the Advance Child Tax Credit for the 2021 year. The Unenroll tool for the advanced CTC is on the IRS Website. https://www.irs.gov/credits-deductions/child-tax-credit-update-portal

Just a few of the FAQ from the IRS website. You can read more FAQ’s HERE

Why Should I unenroll? 

You may want to unenroll from receiving advance Child Tax Credit payments for several reasons, including if you expect the amount of tax you owe to be greater than your expected refund when you file your 2021 tax return. The payments you receive are an advance of the Child Tax Credit that you would normally get when you file your 2021 tax return. Because these credits are paid in advance, every dollar you receive will reduce the amount of Child Tax Credit you will claim on your 2021 tax return. This means that by accepting advance child tax credit payments, the amount of your refund may be reduced or the amount of tax you owe may increase.

You may avoid owing tax to the IRS if you unenroll and claim the entire credit when you file your 2021 tax return.

Here are a couple FAQ from the IRS website

What is the deadline to unenroll? 

To stop advance payments, you must unenroll 3 days before the first Thursday of next month by 11:59 p.m. Eastern Time.

*How do I know if I don’t qualify for the repayment protection for filers based on their income during 2021?

You won’t qualify for any repayment protection if your modified AGI is at or above the amounts listed below based on the filing status on your 2021 tax return.

• $120,000 if you are married and filing a joint return or if filing as a qualifying widow or widower;
• $100,000 if you are filing as head of household; and
• $80,000 if you are a single filer or are married and filing a separate return.

For information on the definition of modified AGI, see Topic C: Calculation of the 2021 Child Tax Credit.