If you would like to apply for next year, you submit a new application. We cannot reuse a previous application, so go to Apply and register again. If there are two links to choose from, make sure you register for the correct year.
If you have accepted an offer for this year, but would like to start it next year instead, you should ring the university or college and ask them if you can defer the place until next year. If they agree, your place will be held for you. If you'd like to attend the same university or college but for a different course, discuss your options with them. They may be able to change the course, or they might ask you to reapply.