I keep referring people to sign up for the e-newsletters. This was in my email Monday, May 4th:

"Issue Number: COVID Tax Tip 2020-50

VA and SSI recipients act now to add eligible children to Economic Impact Payment

People who receive Supplemental Security Income and Department of Veterans Affairs benefits who have children need to act by May 5 to quickly receive the full amount of their Economic Impact Payment. Those who need to act are those who receive SSI or VA Compensation and Pension benefits and didn’t file a tax return in 2018 or 2019.

Their $1,200 payments will be issued soon. In order to add the $500 per eligible child amount to these payments, the IRS needs the dependent information before the payments are issued. Otherwise, their payment at this time will be $1,200 and, by law, the additional $500 per eligible child amount will be paid in association with a return filing for tax year 2020."

I know they keep stating "soon," so here:

https://www.irs.gov/newsroom/ssa-rrb-recipients-with-eligible-children-need-to-act-by-wednesday-to-q...

"SSI recipients will receive their automatic payments in early May, and the VA payment schedule for beneficiaries who receive Compensation and Pension (C&P) benefit payments is still being determined."

and:

"WASHINGTON — The Internal Revenue Service today issued a special alert for several groups of federal benefit recipients to act by this Wednesday, April 22, if they didn't file a tax return in 2018 or 2019 and have dependents so they can quickly receive the full amount of their Economic Impact Payment.

Their $1,200 payments will be issued soon and, in order to add the $500 per eligible child amount to these payments, the IRS needs the dependent information before the payments are issued. Otherwise, their payment at this time will be $1,200 and, by law, the additional $500 per eligible child amount would be paid in association with a return filing for tax year 2020.

Following extensive work by the IRS and other government agencies, $1,200 automatic payments will be starting soon for those receiving Social Security retirement, survivor or disability benefits (SSDI), Railroad Retirement benefits, Supplemental Security Income (SSI) and Veterans Affairs beneficiaries who didn't file a tax return in the last two years. No action is needed by these groups; they will automatically receive their $1,200 payment.

For those benefit recipients with children who aren't required to file a tax return, an extra step is needed to quickly add $500 per eligible child onto their automatic payment of $1,200.

For people in these groups who have a qualifying child and didn't file a 2018 or 2019 tax return, they have a limited window to register to have $500 per eligible child added automatically to their soon-to-be-received $1,200 Economic Impact Payment. A quick trip to a special non-filer tool on IRS.gov by noon Eastern time, Wednesday, April 22, for some of these groups may help put all of their eligible Economic Income Payment into a single payment."

This page has FAQ added late April and to today, May 6:

https://www.irs.gov/coronavirus/economic-impact-payment-information-center