I need to change my fuel filter but dont know wheres its located

I recommend you get the Haynes or Chiltons repair manual for your vehicle. Fuel filters are located at different locations based on the year the vehicle was made and vehicle type. Some vehicles have the Fuel Filter located in Fuel tank on the fuel pump on newer models while some actually have 2 filters. One of these manuals will tell you for sure where and how to replace it. Without knowing the year, make and model of your vehicle We won't be able to advise you on the location of the filter. Your question posted under the general heading of Cars/trucks with no vehicle information.

Once again, you need to help out with stuff like year/make/model