Select a tasting note, then click on the button located on the bottom left corner of the detail view.
The details become editable, you can now fill the desired fields.
At the end of the edition, click again on the button, the tasting note is updated and the detail view becomes read-only again.
Link a tasting note to an existing reference!
Like for your references, you can also modify your tasting note by double-clicking. Select a note, double-click on the detail view, fill the fields and double-click again to save the edition.