If you intend to study at the University of Edinburgh, then you should read your offer message and accept it through the EUCLID Applicant Hub. Please note that you can accept the offer even if your course enrolments are not finalised.
Technical support with your application after it has been submitted is provided by our colleagues in Student Systems:
http://www.ed.ac.uk/student-systems/support-guidance/applicants/post-online-application-help