Begin by preheating your oven to 350°F (175°C).
In a large mixing bowl, combine the shredded rotisserie chicken, white beans, green chiles, and half of the shredded cheese. Stir until everything is evenly mixed.
On a baking dish or sheet, spread out the tortilla chips in an even layer. Spoon the chicken mixture generously over the chips.
Sprinkle the remaining shredded cheese evenly over the top of the nachos.
Place the nachos in the preheated oven and bake for about 15 minutes, or until the cheese is melted and bubbly.
Once baked, remove the nachos from the oven and let them cool slightly. Top with cubed avocado, sliced scallions, chopped cilantro, and jalapeño slices. Serve with a dollop of sour cream and a side of salsa verde.