I can create credit notes and tag payments as refunds without any issues. Can you advise what client in particular (if any) you are experiencing this with please, and also what browser you are using?
Regarding the Google Account, this has been disabled for a while, but as the forums aren't actually made by QuickFile I can't tell you why it was deactivated/removed. Hopefully @Glenn or one of the Discourse developers could help with that point