a few things.....
first, there are press reports the the IRS knows it left some dependents out, so stay tuned.
2nd, IRS FAQ from IRS.GOV:
a letter about the Payment will be mailed to each recipient’s last known address within 15 days after the Payment is made. The letter will provide information on how the Payment was made and how to report any failure to receive the Payment.
3rd, can you please look at your tax return where your children are listed.... look WAY OVER to the right and please confirm that the check marks are all under "child tax credit". If any of the check marks are under "other dependent" - that would explain why a child was left out. All of the children are under 17 years old as of 12/31/19, right? Please post back if any of the check marks are under 'other dependent credit" and we can work through that
4th - worst case scenario:
- The stimulus payments are really based on your 2020 tax return (income, dependents, etc).
- The IRS is using either 2018 or 2019 – whatever is available - to ESTIMATE that payment
- When you file next year there will be a “settle up” section on the tax return.
- If you are due more stimulus (and this would include where a qualifying child was left off including children born in 2019 and 2020), you will receive it through the 2020 tax filing as an additional refund
- If you received too much stimulus (not the issue here), by law , you are not required to return it
