Required Minimum Distribution (RMD)

[Suzham]

I have a Traditional IRA and must begin withdrawal soon.  In the past I made one AFTER TAX contribution, which now must be accounted for in my taxes by TurboTax.  My broker will give me my RMD, but what is the best way to handle the AFTER TAX amount?  

I did not take a deduction for the AFTER TAX contribution the year I made it.

Do I pull out the AFTER TAX part first, last, or incrementally? 

Will TurboTax prompt me for AFTER TAX contribution?