I need a water filter for my refrigerator

I am looking to replace my GE refrigerator water filter gswf. My husband took the old filter off and now the water is awful tasting. I am actually trying to figure out if it would be easier to order if online or go to the appliance center and have them order it. Sometimes you can get things cheaper online, but I really don't know if I can actually order it from GE directly or not. Time to do some research!