I seem to be having this problem with one institution, but I think I know the reason. TT only allows 10k transactions. I am getting error code 103, which is a login error, but I think it May be due to the number of transactions i have.
I tried HR block online also, and got the same error, so it's definately not just a TT problem. I'm going to do a summary entry and mail it the 1099 as requested.
The only way around it is to use TT online which allows upload of the pdf of the statement, and enter summary info.
