I have started the application procedure in 5 universities across Europe but I would like to postpone one of them as it is quite late and I prefer applying next year because I believe the late date will harm my chances. Any suggestions how to do this in a way that does not harm my future application. Simply not submitting it is not an option I guess.
It depends on the school. Some schools allow you to choose to which year you are applying on the application. For others you will have to use a new version of application next year. In that case, save a copy of your answers on the Word document and use those answers next year. Applications change sometimes year to year but the main questions should remain the same.