How do I update my rooted Note 3 to Android 5.0?

[AC Question]

I'm trying to update my Tmobile Samsung Galaxy Note 3 4.4 to Android 5.0 but my device is 'rooted'. I did the complete unroot via the SuperSu app, rebooted, and now my phone still says that my device is modified. What can I do?? I've been trying to unroot for months and I have no idea what else to do

 

[nahoku]

You tripped Knox when you rooted. There's no going back to an "unmodified" device.