Please edit your question to clarify what lines are being referred to on what forms. The worksheet titled "IRA Worksheet" in the forms list refers to TurboTax's IRA Deduction Worksheet which has nothing to do with Roth IRAs. so I don't know what line 8 you are referring to. Similarly, TurboTax's 1099-R Form has no line 38. There is a line 38 on TurboTax's 1099-R Summary, but that just shows the total of any state tax withholding on Forms 1099-R, not anything that seems relevant to you question.
[Edit] I think you are referring to line 8 and section VI of the IRA Information Worksheet. I'll take look at your details with that in mind.
