Some trans feminine people don't care for being called dude or variations of the same. Trans people in general tend to have complicated feelings about how others refer to them. Others don't care one way or the other. If you're not sure, just ask. If you slip up then correct yourself & move on. Not much to it. This advice should also apply to pronoun stuff.

Some transphobes like to act like there's a whole complicated song & dance you gotta do so the scary trans people won't be triggered if you talk to them or whatever. Its really not like that, all ya gotta do is ask & be respectful.