Want Help for Edit .flac Tag from file name

Rename is for renaming files.

If you want to edit tags or other metadata, the Rename command is the wrong one to use. SetAttr META... is what you want.

But you will need to write a script or something to parse your filenames and split them out into tags.

I think these two posts have examples similar to what you're trying to do:

The first one looks easiest to edit, since it already splits multiple tags from the file names. You'd need to modify the re.Pattern = ... line to match your filename order/format, and remove things like year which you aren't using in your filenames.