Can't find location of oil filter on my 2006 1100 vstar

The filter is located under the Yamaha plate on the right side of the engine. You have to remove the front cylinder exhaust pipe to get to it. The filter cover is behind the exhaust pipe. If you have boards instead of pegs on your bike you have to also take loose the right board and brake pedal assembly. You may be
able to get to the filter cover by just loosening the exhaust header and the muffler brackets so that the pipe can be moved aside so you can get an allen wrench into the bolts holding the cover on. There are five allen head bolts.
Once this cover is removed, you will have access to the filter plate holding everything in. Pay attention to how the filter comes out. The filter will fit back in either way, but it does make a difference for it to seal properly. Check the O-ring on the cover. Again, be careful to put the filter back in the same way it came out.