Preheat oven to 350F.
Cook pasta according to package instructions. Gently toss with 1 tablespoon olive oil. Set aside.
In a skillet over medium-high heat, cook ground turkey until no longer pink. Add taco seasoning and ¾ cup water. Bring to a simmer and let cook until most of the liquid has been absorbed. Stir in cream cheese and taco sauce until the cream cheese has completely melted.
Spread about ¼ cup of the salsa in the bottom of a 9x13-inch baking dish. Fill pasta shells one at a time with 2 - 3 tablespoons of the ground turkey mixture. Transfer to the baking dish. When all shells are done, top with remaining salsa and shredded cheddar.
Bake in preheated oven for about 15 minutes, until cheese is bubbly.
Top with chopped green onions and crumbled tortilla chips before serving.