If your filling the tank past the first click off, then you could be saturating your charcoal canister. If that is not your problem then look carefully at every fuel line and filler line. The problem needs to be found soon as it is not safe to drive if gas fumes are detected.’
Thanks for your response!
I've been sniffing around. It doesn't seem to be coming from the engine compartment. As far as I can tell, it's in the area of the filler cap/neck area. What do you think now?