Hmmm . . . it depends on which LDS scholar you read.
Read Kerry Muhlestein’s article, “One Continuous Flow: Revelations Surrounding the ‘New Translation'”, in the 37th Annual Brigham Young University Sidney B. Sperry Symposium.
In the infancy of the Church, Joseph’s revelatory work on translating the Bible and his other concurrent revelations laid, stone by stone, a doctrinal foundation upon which the Church would firmly stand. The revelations resulting in the Joseph Smith Translation, which he called the New Translation, and those in the Doctrine and Covenants are not two separate sides of this foundation but are instead many individual stones that overlay and interlock” (40-41).
Do you have the New Translation constantly by your side for Scripture reading?
I consider an authoritative Bible Commentary more than anything else.
The standard LDS scriptures most Mormons carry have JST renditions in the footnotes.
Todd, as Seth said, it’s in the footnotes in the KJV that is published by the Church.