If you have found someone in the newly released 1940 census, have you looked at the very far left hand side of the page? Some enumerators made notes about their enumerees there–some of which can be good clues for further research. One enumerator in Warsaw, Illinois, made notes about which homes were owned by an estate that had not yet been settled.
Scanning down the name column to find your person is good, but after you have found them, look at the entire page.
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