Lina,
Per your link, I called customer support today to enquire exactly what the '1099-B negative value issue' is. It was confirmed it was a different issue from my partial import from E-Trade issue and completely unrelated. The link you provided describes "customers impacted by the negative proceeds values issue that is preventing the e-file submission of tax returns" and states TurboTax is working with the IRS to resolve. Clearly the IRS has nothing to do with problems accurately importing investment sales data from E-Trade brokerage.
Customer Service said the (closed) 'case number' just refers to my call-in which is always closed after a call and instead gave me an Investigation number INV11219.
