When you enter a traditional IRA contribution into TurboTax, TurboTax will tell you how much of the contribution is deductible. You'll need to make sure that you made all of the entries for income and and above-the-line deductions that go into determining your modified AGI since a change to your modified AGI after you have entered the traditional IRA contribution will cause TurboTax to automatically re-determine the amount of the contribution that is deductible. TurboTax will present a summary of your retirement contributions when you are Done with entering Deductions & Credits and you continue forward, or you can examine Schedule 1 line 19 at any time to see how much of the contribution you entered is deductible. You can always revisit the IRA contribution section if you decide change the amount that you indicated that you would be contributing to an IRA.
