Now that your vehicle has been prepped for the procedure, it's time to remove the old fuel hoses. Get underneath the car again, locate the fuel filter, and remove the plastic shield that surrounds it. Place a catch pan or a towel underneath the filter just in case any gasoline leaks out -- and it probably will (no one ever said vehicle maintenance was a clean job).
Using a screwdriver or a wrench, loosen the hose clamps until they slide back and forth. Again, keep your pan or rags handy because gasoline could leak out of the hose. Once the clamps are loose, you should be able to remove the fuel hose. If not, you can use a blade to free it if you have to. Now, locate and remove the other end of the old fuel hose. You should be able to pull it out with a little effort.
Again, it's best to consult your vehicle service manual for information and tips about removing your fuel lines. Just remember, every car is different. For instance, an older Toyota will have a very different fuel hose placement than a brand new Porsche. Ford cars differ from General Motors cars, and so on.
There may also be more than one fuel hose to remove, so make sure you know what you're taking out. Also take precaution not to remove something that you shouldn't, and that you don't accidentally damage the fuel pump or fuel filter in the process.