Preheat oven to 375 degrees. Brown ground beef, then drain.
Return ground beef to skillet & mix w/taco seasoning as directed on pkg. Place taco seasoned ground beef into an 8x8 casserole dish, then pour in the hash browns, then mix in the cheddar. Then place the uncooked pie crust on top(you may have to cut the pie crust to make it fit the dish.) Bake for 45-60m. Let stand 5-10m before serving.