No, it would not add the earnings to your 2017 return. If you had code P in Box 7. Again, you'll be prompted to amend 2016, but you've already reported the earnings on your 2016 return
Because you are using a desktop version of TurboTax, you can access the forms in your return, by clicking Forms in the upper right hand corner of your screen. You can see the IRA Contribution Worksheet that was used to compute your allowable IRA contributions. See this link from the IRS https://www.irs.gov/retirement-plans/2017-ira-deduction-limits-effect-of-modified-agi-on-deduction-i...
If you are still experiencing difficulties, please comment back here with specific information about your income and contribution, and which type of IRA this is.
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