I have a 04 Screaming Eagle Electra Glide Is there a fuel filter in the tank and how ofter does it need to be serviced? Del Nel 
The filter is on the fuel pickup in the tank, and changing it requires removal of the fuel pump assembly. I believe the maintenance schedule calls for replacement at 20k miles.
Do-it-yourselfers can buy the replacement filter kit which includes a new hose and clamp. I believe the part number is 61001-01.
Jerry
PS As Chief noted, this isn't something that most folks would ever actually change. It's the same sort of arrangement that you have on the fuel pickup in your automotive gas tank, and I'm willing to bet that 99.9% of the folks here have never changed one of those. If it actually becomes clogged, you will know because it will reduce fuel pressure which will then affect the way the bike runs and it will set a trouble code.