I remember someone posting about a crosswalk for putting the old geographies in the new 2020 geographies.
I failed to bookmark this.
Could you please reshare.
Thanks.
Here's the previous post: https://acsdatacommunity.prb.org/discussion-forum/f/forum/948/2020-acs-5-year-data-2010-2020-geographic-crosswalks-now-on-ipums-nhgis.
Block association files may also help www.census.gov/.../2020-census-block-record-layout.html