The Treasury Department now says that Americans on Social Security will not be required to file a “simple tax return” to receive a stimulus check from the U.S. government.

CBS reports in greater detail https://www.cbsnews.com/news/stimulus-checks-social-security-recipients-will-automatically-get-checks-treasury-reversal/

Also reported on The Motley Fool https://www.fool.com/retirement/2020/04/03/trumps-stimulus-check-and-social-security-what-you.aspx