Yes, if you are eligible to make a deductible Traditional IRA contribution, then your taxable income can be reduced.
However, there are income limits that are applied to determine whether you are eligible to deduct your Traditional IRA contributions. See the following TurboTax help article to learn more:
Is an IRA contribution deductible?
Also, making a non-deductible Traditional IRA or Roth IRA contribution will not reduce your taxable income.
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