Split of proceeds with joint tenancy where home is primary residence for one of them

[Josiah Mouw]

What are the options for dividing the proceeds on the sale of a home where 2 owners are “joint tenants” on title (not tenants in common), and it was the primary residence for only one of them? Scenario is this: son bought a home for his mother, he’s on the note alone but both are on title as joint tenants. Home is now being sold. Just trying to understand tax implications. Thanks!