Ok, I have tried even doing in terminal ~/Trash then rm -rf to clear it manually, and in my Finder preferences I have deselected the "give warning" when emptying trash icon.
My issue is I have these folders which I don't think actually contain anything, however when I was backing up another computer that I had connected I accidentally dragged all the important folders copied to the trash on this main computer - Applications, History, etc. Now they just sit in trash and when I put new things in trash, EVEN THOUGH I have the warnings off I get these dialogues from finder saying:
The operation can’t be completed because the item “folder's name” is in use.
Some items in the Trash cannot be deleted because of System Integrity Protection.
I just hit Continue and everything in Trash EXCEPT the folders gets deleted. How can I remove these folders? I need them off my computer - any other CLI commands to try?
EDIT: ls -l ~/.Trash returns nothing in terminal.