I found the answer myself. Even though we're ineligible for Roth contributions, we established our bases by cumulating prior years. We apparently missed on or two. To make the basis correction, I had to go to Ded & Cred/Traditional & Roth Edit, select Roth IRA for T/P & Spouse, and follow the prompts. Eventually, it'll ask for Roth Basis. That's where the correction is made. Must do the drill for each taxpayer.