I don't think you will find James and Josephine together in the 1920 census. In 1930 they had only been married 1 year. He was 31 and states that he got married at 30, Josephine was 18 and states that she got married at 17. You should therefore look for them separately.

This might be your Josephine, living in Bluestone, Mecklenburg, VA

Young, (looks like Olie) MU 34 Head WD

McKinley MU 17 M

P(???) MU 14 F

Fannie MU 12 F
looks like Osie MU 10 F

Josephine B 7 F
Williams, Fannie 51 mother

Best wishes in your search,

Betty