Preheat Oven To 350 Degrees F (175 Degrees C). In A Small Bowl, Combine The Sour Cream And 3/4 Of The Cheese. Into A 9X13 Inch Pan, Pour A Small Amount Of Enchilada Sauce To Coat Bottom Of Pan. Layer 6 Tortillas On Bottom Of Pan. Layer Half Of The Cheese-Sour Cream Mixture And 1/3 Of The Olives Over The Tortillas. Repeat This Layer Once More. Pour The Remaining Enchilada Sauce Over The Final Layer Of Tortillas. Bake For 20 Minutes. Cut Into Squares And Serve