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SusieQ100 - if you don't want any tags downloaded then :
You can also restrict what metadata gets downloaded from which sites - e.g. some people only download 'Tags ' from Goodreads.
You can remove a Tag from all books that have it, via the
Tag Browser right click Delete Tag... options.
And you can remove, merge, and correct Tags via the
Alter Tag Browser->Manage authors...->Manage Tags feature -- IMO this is the best way to do a major tidy up of Tags and other categories.
BR