Here's the tab that goes along with the Learn to Play Man of Constant Sorrow I shared on YouTube. As with all of my videos, please please please work through the video before you grab this tab. Mind you, I appreciate the money, but I appreciate it even more when folks learn to play without getting "married" to a tab.
This is merely one way to play this tune. There are as many ways as your imagination can manage. I recommend finding your own way - it's truly the best.
If my videos have been helpful, feel free to pay whatever you want as a token of appreciation. My cats thank you. :)