What is taxonomy for turtles?

A turtle's taxonomy is how it is classed. It is in the kingdom of amphibians. The phylum of chordate. The class of reptile. The order of tustudines. The family of Cheloniidae, which are sea turtles with shells covered with scutes (horny plates). They also could be in the family Dermochelyidae, in which they are covered with leathery skin. The only turtle in this category, though, is a leather-back turtle.