Edit tags section is located in the top bar of the 'Requests/Quotes' section, right to the 'FILTER' option
The Edit tags section lists all the created tags and allows:
In order to create a new tag, the process is as follows:
In order to filter, simply insert the required tag name in the 'Filter or Create' box.
In the case of newly created tags, the name stays in the 'Filter or Create' box. Since this box works as the filter at the same time, in order to preview all the available tags, you need to remove the newly created tag name from the box.
In order to delete existing tags, the process is as follows:
Once the tag is deleted, it is also removed from all the requests it is assigned to.