After many unsuccessful attempts, waiting on the phone for hours, being told by Netxinvestor Tech Support that all the info I entered in TT are correct, then being told by TT Product Support that this is a known problem that has no ETA of being fixed (even by Apr 17) and the only way is to go to "plan B" and entering the 1099-B and -DIV info MANUALLY, I fumbled around and found the solution that worked for me: Select my Financial Advisor's name , Securian instead of Netxinvestor or Pershing from the "bank and brokerage" drop down list.
You may want to give it a try.
