Leave box 2a blank. After you enter the 1099-R and continue the interview after the 1099-R summary screen then the 2nd part of the interview will ask if you had a basis (non-deductible contributions), answer yes add enter the amount of remaining basis that had not already been used, then it will ask for the previous years year end market value of the IRA (get that from the IRA yer end statement. TurboTax will then calculate the taxable/non-taxable amounts of the distribution on a 8606 form that becomes part of your tax return.
**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.**
