Get your taxes done using TurboTax

@jrbader1 - I meant the total tax (1040 line 63) divided by AGI.  (I corrected)

On a test return I divided line 63  ($26,774) by 38 ($166,779) * 100 = 16.053

The effective tax rate calculated by TurboTax on a PDF printout was 16.05%

That looks fine to me.  Where do you see it different?
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**