Under the pension section "where is this distribution from?", I checked the "none" radio button but when I go back to check it, it is changed to "pension/IRA distributions received before retirement age". How do I ensure the "none of the above" stays checked?
It will stay checked to None after you leave that screen. On some screens, when you re-enter the screen, the value appears to be changed for design purposes, but unless you continue off this screen without setting the answer back to None, the answer will stay None.
It is a bit puzzling, but just know if you happen to revisit that screen, you'll need to make sure that you set the value to None before you leave.