Reindex Taxonomy URLs? I have a list of terms all with assigned URLs already.
When I change the term and the URL, it is not updating.

I feel like there's a cache or reindexing needed ?
Do you have change the taxonomy term name manually or the url alias?
If you only have change the name you must to check the field "Generate automatic URL alias" is checked to change the url automatically.

If is checked or you have change URL alias manually then clear cache in /admin/config/development/performance

I hope that helps.