Using Helen's info, I found their marriage which led me to Helen's profile Emery-1389 which you hadn't linked to Ernest.
Adding all that info and back to adding Ernest manually, I find:
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XMDN-DVC : accessed 5 January 2022), Ernest J M Goodwin Jr. in household of Ernest J M Goodwin, Wells, York, Maine, United States; citing enumeration district (ED) ED 59, sheet 13B, line 71, family 358, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 842; FHL microfilm 2,340,577.
1930 census, age 20, list father, mother & sister