Why would you want to deactivate?
It's a safety warning if a tyre is going flat, you should always reset after checking tyre pressures.
What you do is check tyre pressures, then set to activate and drive the car slowly and it sets itself, that's all you do.
Be aware that wheel spinning/fast cornering can fool it and it will give a warning.
Personally I think it a great safety feature
"Life's too short not to!!"