are you 70 1/2? if not then the pension is taxable (box 2 is often left blank but needs to be completed) and the "QCD" needs to be entered directly in Schedule A. Turbotax will only ask questions about QCD if you are over 70 1/2
with a proper QCD the gross distribution shows up on 4a but only the taxable portion shows up on 4b after deducting the QCD. nothing gets deducted if it isn't a QCD
a QCD never shows up on 4b. the whole purpose of a QCD is to allow distribution from an IRA after the taxpayer is 70 1/2 and if transferred directly to charity (max $100,000) the taxable portion of the distribution is reduced by the QCD so the taxpayer gets no charitable deduction. this is usually much better for a taxpayer because AGI is reduced.
