My cost basis is blank on my 1099-B, but I was able to find the correct number to enter, so as you said, I chose "cost basis is incorrect or missing." However, when I enter the amount on the screen that says "I know my cost basis and need to make an adjustment" and hit continue, it takes me back to the sales page and that sale is listed as "needs review" and Turbo Tax tells me I need to go back and fix things in that section so I can file.
