If you’ve previously added tags to any of your notes, you can search for the tags by using tag keywords. In OneNote 2016, the results appear in an easy-to-read summary.
Note tags need to be associated with typed or handwritten notes in order for them to appear in your search.
Note: If you have applied multiple tags to any item in your notes, but the Tags Summary shows only the first tag in the results list, please update OneNote 2016 to version 16.0.7466.2038 or later. To do this, click File > Account > Update Options > Update Now. After OneNote has been updated, click Find Tags on the Home tab to display an accurate Tags Summary.
Do the following:
Click Home > Find Tags.
In the Tags Summary task pane that opens, click any tag in the list to open the page that contains the associated tagged note.
Tip: To narrow the search, at the bottom of the Tags Summary task pane, click the Search drop-down, select a narrower search scope from the list, and then click Refresh Results.
If you want to view the tag search results as a notes page, click the Create Summary Page button at the bottom of the Tags Summary task pane.