In order to access the service, you should go to the Companies and Contacts page.
/!\ you need to have "Annex Validator" permission on your EPIC user account in order to be able to update the contact information of you company.
If you do not see the "Review & submit changes" button as illustrated on the second picture below, it means that you do not have the "Annex Validator" permission on your EPIC user account
Related articles:
What is the role of Annex Validator? – Help Center (epic-portal.io)
How do I know if I am an Annex Validator? – Help Center (epic-portal.io)