Two ways...
1- The Advanced Tagging and Reporting Tools Plugin allows for reports in different formats (HTML, txt, etc)
2- Preferences > Tags (2) > tag handling > 'send to clipboard' tags [set up the tags and format you want to use] then select the tracks you want to list and use the command 'send to > clipboard' from the right-click context menu. Paste your clipboard into a text editor or a spreadsheet application.