I originally wanted to root so I could wifi tether for free. And then I rooted my phone using this guide:
How to Root Sprint Galaxy Note 2 SPH-L900! | Galaxy Note 2 Root!
Then about 3 days later an official OTA update came out and that is one of the reasons. And I know that you could just use toolbox to update but I just blew off the popup for a while. So one day, I got up in the morning and my phone wouldn't turn on, the red light would flash but it wouldn't actually turn on. I looked it up and some people were calling it the death note. But anyway, I didn't want to have to turn my phone in because I wasn't on stock ROM and my binary count was up. So I couldn't turn in, and now I want to unroot completely with no evidence at all. I feel that being rooted is too high of a risk for me right now because I don't know enough about the subject yet and I feel like I could mess up my phone, and I can't afford another. So I just want a completely stock phone with all of my contacts and stuff, and I want TRWP off also. And that's why I came to this forum, to ask for your help.
P.S. Once I got the "death note" I just put it in downloading mode and restarted the phone like that and it has been working fine ever since