How to call Topaz Sharpen from Photoshop?

A ton of plugin "pointer files" have the extension .8bf (and some .8li).

Often you can find these in the install folder of the plugin, and you can copy these to your common plugin folder.
For me on Win 10...
c:\Program Files\Common Files\Adobe\Plug-Ins\CC\

AFAIK, these will then link to the actual plugin (when it's not the plugin itself) and show up in the menu.

I find this very simple, but if you don't, indeed better to look at Topaz manual, FAQ, etc.

I would try to remove or uninstall Topaz Sharpen, then do a fresh install. At some point near the end of the install it should

notify you that the Photoshop plug-in is being installed.

After restarting Photoshop the filter should be available as Kevin suggests, in Filter, Topaz Labs, Sharpen.

If that fails then I would contact support at Topaz to find out how to manually install the plug-in in the appropriate folder.

I don't have that, but some (also) put an item in Edit > Automate (E.g., Topaz Gigapixel)

It should be listed at the bottom of your Filters menu.

If not, what version of Photoshop and Topaz plugins are you running?