I have heard JWs make comments that having tattoos is wrong and would not be allowed. However, when I looked it up ,a WT said that the Jewish law restricting them was because they were a part of pagan religion and that restriction would not apply today .
The article then went on to point out all the practical reasons for not having one and discouraged it. I have never known a young dub with a tattoo. I have known a couple of older ones who had them in their youth before they were Witnesses.