That depends on whether the album is credited to VA or to some particular artist.
When in doubt, look it up on musicbrainz.org
If it is Various Artists, tag the files with AlbumArtist= Various Artists and put the files underneath the ‘Various Artists’ artist folder.
If it’s some other artist name, put this artist name into the AlbumArtist meta tags and put the album underneath an artist folder, named after this artist.
Various Artists:
Some other artist:
