The "Manage Duplicates" section can be accessed by navigating to Settings>>Manage Duplicates
Within that section, you'll be able to view those contacts that were flagged as a duplicate. You'll have several options within that section:
1. Merge into: this will allow you to merge that contact with an existing record in your Crelate database
2. Allow duplicate: This will allow that contact as a separate and new record
3. Delete: this will give you the option to remove that from your manage duplicates section.