As you remove each plant, you will find long roots. Hold the plant in the carton and fill soil in around the roots all the way to the top leaves, tapping the carton on the counter as you go. Water to eliminate air pockets. The tomato is one of the few plants that has the ability to root from the stem. Too often I see loads of soil going down the street in trucks.
Dirt is filth.
Soil is God-given, and He isn't making much of it anymore, especially around here. Set aside an area in the utility area, or store it in trash cans in the garage. They enjoy cold soil, and the top growth can withstand cool temperatures better than any other annual. The garden centers are full of them and they are small, which means they will transplant well. Of course, if temps lower than 28 degrees are predicted, get out the floating row cover to snug them under.