The Butler County Treasurer’s Motor Vehicle Department would like to remind you that if your last name begins with the letters P, Q & R your tags are due for renewal by September 30, 2021. The Treasurer’s Office has several convenient options available for you to renew your vehicle tags. You may do it online through the iKan website . You may mail in your renewal notice that you received in the mail along with proof of insurance or you may come into either one of their Motor Vehicle offices.