Thank You for your reply,
My problem is that my CSV file is too large. TurboTax will only accept a limited number of transactions, and mine exceeds their limitations. I've tried both .csv and pdf uploads and have the same problem.
In my case, I am able to continue to e-file my Tax Return with TurboTax, however, I will have to physically print out all of my transactions on the 8949 and mail them separately.
