This Thursday April 14th, 11:59:59 is when pre-registration ends for credit cards.
Please note that any changes must be requested before the deadline. Any pre-registration issues that come up after this deadline must be dealt with at-con.
Please be sure to review the Registration FAQ and Policies for answers to any questions you may have. If there is something not answered there or you have a question about your registration, please contact Registration Customer Service.