Nicki Minaj SpaceX's historic all-civilian launch: How to watch Apple event: Everything announced Rivian R1T electric pickup West Side Story trailer Woolly mammoths are coming back

Parents: Didn't file your taxes? Here's what to do now to get the child tax credit check

Parents of nearly 4 million children may miss out on advance child tax credit payments that add up to $13 billion.

19-2021-cash-money-stimulus-bill-600-dollars-check-americans-congress-signed-law-direct-deposit-mail

An estimated 4 million children have not received child tax credit payments. 

Sarah Tew/CNET

Most US families, totaling close to 60 million children, have received child tax credit payments. But according to a report published Thursday by the Center on Budget and Policy Priorities, some 4 million children in low-income households might miss out on the child tax credit this year. The reason being, the IRS doesn't have information to issue checks to these families. The payments are based on your latest tax return. 

In previous years, low-income families or parents without earnings may have received only a portion of the credit, if any at all. But this year's child tax credit means that more families qualify for advance payments, even if they earn too little to file taxes. To register for this year's advance monthly payments as a nonfiler, you can file a tax return or use the IRS nonfilers tool, one of the online tools created by the IRS to assist with the child tax credit rollout.

Each monthly payment is an advance on part of the total credit, which is up to $3,000 or $3,600 per child, depending on age. Families that don't receive monthly payments this year will get the full amount when they file a tax return in 2022. The next payment will be sent on Aug. 13, and families can get up to $300 for each child each month through December. If you believe you qualify, we recommend calculating your total here using CNET's own tool, and reading up on income rules and age requirements. This story has been updated. 

Now playing: Watch this: Child tax credit: Everything we know
4:17

How can nonfiling parents sign up for child tax credit payments with the IRS tool? 

The IRS launched its online tool back in June to help families that don't normally file income tax returns to enroll in this year's child tax credit program. The tool isn't for families who already filed -- or plan to file -- their 2019 or 2020 income tax return. The IRS will use those tax returns to determine eligibility and disburse the coming payments to qualifying families. The Center on Budget and Policy Priorities predicts that it will take families 15-30 minutes to sign up

The free "Non-filer Sign-up tool" is designed to allow the poorest families and those experiencing homelessness to register with their name, address and Social Security numbers. Individuals will be able to notify the IRS about any of their qualifying dependents and can provide their bank information for direct deposit of the payments once they start. 

The IRS has guidance on how to fill out the form. The first step is to create an account with an email address. The next few steps require entering your information, including an address or bank account to receive payments. You'll also need to provide your adjusted gross income, or AGI, and sign the form electronically. 

1. To get started, create an account if you don't yet have one. You'll need a phone number, a password and an email address to confirm your information. Note that it can take up to 48 hours for the IRS to confirm your email address -- and another 48 hours after submitting your information for the IRS to accept it.

2. On the next page -- "Fill Out Your Tax Forms" -- enter your information, including your filing status and details about dependents. Those fields are required, but you can skip the optional fields if they do not apply to you. For example, you can also add information about your"Recovery Rebate Credit" on the form, or your banking information to receive your payments electronically instead of in the mail. Tap Continue to Step 2 when ready.

3. On this page -- "E-File Your Tax Forms" -- you'll provide your adjusted gross income, or AGI, and sign the form electronically by creating a new pin. If you did not file taxes last year, enter "0" in the box for AGI and skip the part about last year's self-selected signature PIN. When you're done, tap the Continue to E-File button to submit your information. 

The tool has come under fire by some advocacy groups for not being easy to use. The IRS recommends using the portal on a laptop or desktop computer, not on a phone (the platform on mobile devices is not as easy to read). Users will also need an email address, a solid internet connection, their filing status and other tax-related information, which isn't typically available for nonfilers. For now, it's only accessible in English, though the instructions are available in multiple languages.

Who shouldn't use the IRS nonfiler tool?

The IRS says you shouldn't use the new nonfiler online tool if you already filed a 2020 income tax return or if your adjusted gross income, or AGI, exceeded $12,400 ($24,800 for a married couple). It also says you can't use the tool if your main home is outside the US, if you or your spouse can be claimed as dependents or if you are requesting an advance child tax credit for a child born in 2021. (However, you can use the tool if you need to claim a recovery rebate credit.) 

005-may-17-tax-day-calendar-cash-stimulus-file-accountant-defer-usa-2021-cnet

The deadline to opt out of the Aug. 13 payment has passed, but you can opt out of September's payment by Aug. 30. 

Sarah Tew/CNET

How can parents use the IRS tool to opt out of monthly payments? 

Families may unenroll from the child tax credit to defer the advance monthly checks and instead receive a lump sum of the money during tax time next year. You can unenroll at least three days before the first Thursday of each month. (The next opt-out deadline is today, Aug. 2 at  8:59 p.m. PT  or 11:59 p.m. ET.) The sooner you unenroll, the better because it can take up to seven days for your request to process. In September, you'll be able to re-enroll if you change your mind.

Here are the deadlines for unenrolling from the advance monthly payment program. 

Child tax credit unenrollment deadlines

Unenrollment date Payment date
June 28 July 15
Aug. 2 Aug. 13
Aug. 30 Sept. 15
Oct. 4 Oct. 15
Nov. 1 Nov. 15
Nov. 29 Dec. 15

How do child tax credit payments impact next year's tax return?

The child tax credit payments are advances on next year's tax refund for eligible parents. You'll get half of the money over the course of seven payments in 2021 and 2022. If for whatever reason you receive more money than you're eligible for, you'll need to pay the IRS the difference based on your tax return when you file in 2022. However, there is a repayment protection program to help low-income families that may not be able to repay the extra money. 

Other ways to use the IRS child tax credit tools

We expect changes to the IRS website throughout the summer. For example, the IRS plans to add a Spanish version of the online tools. You can now view your child tax credit payment history and update your direct deposit details in the update portal. Later on, you'll be able to change your mailing information and other household details through the update portal. 

For more information about child tax credit, here's what to do if you're missing a payment