Summary:
Have kids and get SSI/SSDI? Never file a tax return in the last 2 years?
If yes to both questions, report your kids to IRS by April 22 or wait to get their stimulus money next year. Report kids at https://www.irs.gov/coronavirus/non-filers-enter-payment-info-here.
Read the article at https://www.cnn.com/2020/04/21/politics/social-security-dependents-stimulus-money/index.html.