How is turbotax calculating the "effective tax rate" shown on the summary page to the IRS filing?

[jzemanek]

turbotax definition of effective tax rate?

[baldietax]

"Total Tax" divided by AGI i.e. the average rate you are paying by the time all the different credits, deductions or different tax rates are applied to different portions of that income (qualified dividends, long term cap gains, progressive tax table rates etc).