Yes. Apparently, They held a voting referendum and a majority voted Yes
. But they can't bind the US to their referendum so in that sense, ironically, that they can't "pass" jack squat because they aren't a US state.
The taxes matter less than the risk off adding two Puerto Rican/Hispanic Senators. I think that the majority of Congress remains queasy about that... for various reasons. You'd also have to add a star to the flag, which is going to make a ton of merchandise... not to mention tattoos... obsolete... so there's that. Thinking about it... I guess making everyone go back out and buy new flags to hang on their houses and/or local telephone poles is a plus for the flag making industry, kind of like how when a new sports jersey design is released, the teams rake in a bunch of money as everyone rushes to get them.
In any case, the holdup isn't Puerto Ricans wanting
to be a state, the holdup is Congress ignoring them.