Place chicken, flaked, in a medium bowl and sprinkle with the taco seasoning mix, stirring it every few minutes for 10 mins.
Heat oven to 350. Place oil in lg skillet, over med heat. Add garlic and green onions. Save a handful of the green onions for topping. Stir in the chicken and then the salsa.
arrange tortilla chips on a lg baking sheet. Spoon chicken mix over chips. Top w/ cheese and tomato. Cook until cheese is melted, about 10 mins. remove from oven and sprinkle w/ remaining green onions, black olives and dollops of sour cream. Or you can serve sour cream in a ramekin on the side.