Another TurboTax shortcoming. In interview mode, there is no way to enter an "N". It can only be done in forms mode
These are instructions for using code N per 8949 instructions
You received a Form 1099-B or 1099-S (or substitute statement) as a nominee for the actual owner of the property
(Use code) N (column (f)
Report the transaction on Form 8949 as you would if you were the actual owner, but also enter any resulting gain as a negative adjustment (in parentheses) in column (g) or any resulting loss as a positive adjustment in column (g). As a result of this adjustment, the amount in column (h) should be zero. However, if you received capital gain distributions as a nominee, report them instead, as described under Capital Gain Distributions in the Instructions for Schedule D
