Brown hamburger with taco seasoning according to directions on taco seasoning. Line 9 x 13 pan with crescent rolls, crumble ½ bag of corn chips on top of crescent rolls. Put hamburger mixture on top of corn chips and then cover with the sour cream. Please ¾ of bag of cheese on top of sour cream and put other ½ bag of corn chips on top of sour cream. Top off with the remainder of cheese and bake at 375 for approx. 20 minutes or until crescent rolls are done.