The Consumer Financial Protection Bureau (CFPB) has a Rental Assistance Finder to connect renters and landlords to state and local organizations distributing federal rental assistance.
SD CARES Housing Assistance Programs: https://www.sdhda.org/social-programs/cares-act-housing-assistance-program
Call the statewide Helpline at 211, download the free 211 Helpline app, or visit their website at www.helplinecenter.org