The relationship between Ben Taylor and James Taylor is biological: James Taylor is Ben Taylor's father.
Origins of the Relationship
The relationship began with Ben's birth. Ben Taylor was born on January 22, 1977, in New York City. He is the biological son of singer-songwriter James Taylor and singer-songwriter Carly Simon. James Taylor and Carly Simon were married at the time of Ben's birth, having wed on November 3, 1972.
Establishing the Connection
James Taylor rose to fame in the late 1960s and early 1970s as a foundational figure in the singer-songwriter genre. Carly Simon, also a highly successful artist, had major hits throughout the 1970s. Their relationship was prominent in the music industry. Ben and his older sister, Sarah "Sally" Taylor (born January 7, 1974), grew up as the children of these two famous musicians.

Key Points
- Parentage: James Taylor is Ben Taylor's biological father.
- Mother: Ben Taylor's mother is singer Carly Simon.
- Timeline: The relationship originated when Ben was born in 1977 to James Taylor and Carly Simon, who were married from 1972 to 1983.
- Familial Link: They share a father-son relationship; there is no other documented historical or professional origin.
Distinct Careers
While Ben Taylor also pursued a career in music as a singer-songwriter, starting in the late 1990s, this is a separate professional path from his father's legacy. Their relationship is personal and familial, not the start of a musical partnership or collaboration lineage.

Conclusion
Ben Taylor's relationship with James Taylor is solely one of biological descent. It "started" upon Ben's birth as the son of James Taylor and Carly Simon. Their shared family history defines this connection.