There are several census with a Tacy Stoddart b. abt 1812 in NY. Some examples here. More can be found using the free search tool at: https://familysearch.org/ Do you know the names of any of her children?
U S Census, 1860 Dansville Ward, Steuben, NY Page: 36 Family Number: 275
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Tacey Stoddard F 50 years Birth Est 1810 N. Y.
Charles Stoddard M 20 Birth est 1840 NY
U S Census, 1870 Rosemount, Dakota, MN
Citing this Record "United States Census, 1870," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MD41-ZW4
Tacy Stoddard M 60y NY
Sarah Stoddard F 24y Can
Servant Minnie Ryan F 22y Prussia
U S Census 1880 Rosemount, Dakota, MN
Citing this Record "United States Census, 1880," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MZ93-MH1
Self John Gilman M 46 NY
Wife Hellen M. Gilman F 43 NY
Dau Mary Gilman F 22 MN
Son John P. Gilman M 14 MN
Son Fred H. Gilman M 9 MN
Dau Bertrude K. Gilman F 2 MN
Mother-in-law Tacy Stoddard F 70 NY Widow