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From: https://www.investopedia.com/terms/e/effectivetaxrate.asp

  For an individual: ETR = Total Tax ÷ Taxable Income

 

Definitely not what I am seeing from Turbo Tax return summary.  I suggest Turbo Tax either fix this calculation or stop referring to this strange calculation as Effective Tax Rate....as you are totally confusing your user base with some meaningless number which seems to be much lower than it should be (giving users a false belief that their ETR is very low)