A non-deductib contribution is a Traditional IRA contribution that was not deducted from your income in the year that the contribution was made, either because you did not wish to deduct it or your income was top high to allow a deduction. That would create a basis in the IRA so that any distributions, including conversions, would not be fully taxable. The 1099-R interview asks if you have any prior year non-deductible contributions or automatically carries it forward if tracked in TurboTax.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
