I just ran into the same problem described above. TurboTax's handling of Traditional IRA Basis needs to be fixed. I just discovered that they dropped the 8606 from several years even though they created the worksheet.
This year I found an interview to enter explanations for the Basis discrepancy, but then they merged both my and my spouse's explanations into one combined basis that adds both out numbers together, even though spouses' IRA Bases should never be combined. And it then gets included this combined mess in the Tax return as a "Blank Form".
