Unique SEO title for Tag filter pages

I have tag pages and want each tag page to show a unique SEO title on them, so the SEO title is not a duplicate of the homepage (as it is now out of the box).  I need code to enter to be able to set this up.  The SEO title on each tag filtered page should pull in the name of the page's tag, rather than what the unfiltered page has on it.  

For example, on this page: https://www.sedonastarsongs.com/home/tag/Sedona+vortex+expansions

The SEO title should be "Sedona vortex expansions - Sedona Star Songs" rather than the homepage title that it has now.

Can anyone write code to do this?