Congress has the right to levy taxes under the Taxing and Spending Clause. However non voting members can’t vote on any laws and therefore can’t vote on tax related law . Wikipedia says They receive compensation, benefits, and the ability to send mail without a stamp like full house members. I’ve heard they can vote in committees but I can’t confirm that

so I would say this is taxation without representation. Or taxation with the most minimal amount of powerless representation possible. But that’s a longer phrase