Retirement tax questions

When you are over 70 1/2 you need to withdraw a certain amount from a retirement IRA or fund that was deferred income ( ie. no taxes have been paid on it).  RMD is that Required Minimum Distribution.  There is a calculation to determine the amount based upon current value of the IRA or fund.  I suspect this is not a deferred income, so you would not treat this as part of a RMD.