Brown the ground turkey and add taco seasoning, following the directions on the package of seasoning.
Get a two quart pan, pour a can of enchilada sauce on the bottom. Layer 6 tortillas over sauce. Spread turkey and cheese over layer and cover with another 6 tortillas. Spread the rest of the turkey and some more cheese on top then cover with the last layer of 6 tortillas. Pour the remaining cans of enchilada sauce over the top and cover with the remainder of cheese.
Cook in oven at 350 degrees for 10-15 minutes. Let cool and serve with sour cream.