Bucko says if you pay on line E-check is free but credit and debit cards have a fee. Provide your email address and check the box to get a receipt that a payment was made. He says taxpayers have until 11:59:59 on May 10, 2013 to be on time when paying online. If paying at the Treasurer's Office at 155 Indiana Ave. Valparaiso IN office hours are Mon-Fri. except holidays 8:30am to 4:30pm. Call 219-465-3470 to for information.