Q.Splitting a large jade plant in two
I have a large jade plant that came with my house when I bought it. I am assuming that both the trunks are connected under the soil. How can I split the plant in two without killing the jade so I have 2 large jade plants? I attached a photo of the plant.

This is a large plant and division of the plants would not be recommended or likely successful.
Large overgrown Jades are best dealt with by propagating new plants from cuttings.
Here are some links with more information.
https://www.gardeningknowhow.com/houseplants/jade-plant/propagating-jade-plants.htm
https://www.gardeningknowhow.com/houseplants/jade-plant/jade-plant-care.htm
https://www.gardeningknowhow.com/houseplants/jade-plant/pruning-jade-plants.htm
https://www.gardeningknowhow.com/houseplants/jade-plant/limp-jade-plant-help.htm