Tax lien on credit report isn't mine, its my dads.?

I Did a credit report today and found 3 tax liens that aren't mine but actually my dads. He didn't pay his property tax on his Jet Ski for three years and as a result had tax liens placed on them but they were put on my credit. We do share the same name him being the Jr. and me being the 3rd. I filed a dispute with transunion ( because transunion is the only agency reporting it) but im afraid its not going to work. What should I do? Do I have to go to the county recorder and dispute it there? I am mad because I am looking at getting a new car and having 3 tax liens on my credit certainly doesn't help. Please any information would help, I need to get this fixed ASAP. Thank you so much for your comments.