CA Prob Code Section 3411

(a)

A parent of a minor entitled to custody of the minor, the guardian of the estate of the minor, or the person holding the money belonging to the minor may file a petition requesting that the court make an order under this article.

(b)

The petition shall be filed in the superior court of:

(1)

The county where the minor resides if the minor has no guardian of the estate.

(2)

The county having jurisdiction of the guardianship estate if the minor has a guardian of the estate.