I had the same problem with all of my brokerage accounts. After trying, all of the advice found here and on the Internet, I decided to enter everything manually. But the problem is, it seems, that once TurboTax, has you marked as importing your 1099s, it won't let you go back to manual entry.
I fussed around with this for quite a while, even deleted and reinstalled TurboTax to no avail. However, I finally found a way where I could manually enter my data, even though TurboTax kept forcing me into an import loop.
What I had to do was go back to wages and income, and then go to where you enter your stock information. It then comes up with a screen that says "let's finish pulling in your investment income." Go down until you see the line that says "add investments." Click on the add investments.
Next you should see the screen that lists all of the possible brokerages. The secret here is to go toward the bottom and click on Skip Import.
Now you are back to where you can enter your 1099 manually.
Iin retrospect, it may seem obvious, but it wasn't obvious to me.
