1. From your dashboard, hover over the left-hand menu. Place your mouse pointer here.
2. The tab should appear as illustrated below.
3. Click Settings.
4. Scroll Down, Click Data Deduplication
5. Click Refresh
Data Management: Data Deduplication - How to Refresh the Duplicates
Refreshing duplicates allows the system to re-scan your data and detect new duplicate records based on the current deduplication settings (such as the similarity threshold and selected fields).