IRS guidance for non-filers who want in on the action:
"IRS Encourages Non-Filers to File 2018 Now for Potential Stimulus Help"
IRS Updates — 03/24/20 1:56 PM
The IRS encourages anyone with a tax filing obligation who hasn’t filed a tax return for 2018 or a previous year to act now. – Pending legislation includes certain potential credits and rebates for those who have filed a return for 2018 and/or 2019. Those without 2018 tax filings on record could potentially affect mailings of stimulus checks. And more than 1 million people who haven’t filed tax returns for Tax Year 2016 and are owed a refund still face an April 15, 2020, deadline to file their return. This deadline hasn’t been extended. Current law requires the 2016 return to be filed by April 15, 2020.
The IRS is encouraging non-filers to consider contacting a tax professional to consider various available options since the time to receive such refunds is limited by statute. Once delinquent returns have been filed, most taxpayers have the opportunity to resolve any outstanding liabilities by entering into an Installment Agreement or an Offer in Compromise with the IRS to obtain a “Fresh Start.” See IRS.gov for further information."