According to the invention, there is provided a novel soybean variety designated XB33T08. This invention thus relates to the seeds of soybean variety XB33T08, to the plants of soybean XB33T08 to plant parts of soybean variety XB33T08 and to methods for producing a soybean plant produced by crossing plants of the soybean variety XB33T08 with another soybean plant, using XB33T08 as either the male or the female parent.