You can find your marginal tax rate and average tax rate in TurboTax by reviewing your Tax Summary or Detailed Tax Summary after your return is calculated. These summaries show the breakdown of your income, taxes, and the rates applied to your taxable income.

The marginal tax rate is the rate applied to the last dollar of your taxable income, while the average tax rate is your total tax divided by your total income.

For more information, please visit this TurboTax Article 

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