Get your taxes done using TurboTax

To put it another way, your financial institution is telling you that they and Intuit (TurboTax, Mint) have not solved this problem together, since both are involved to make it work. Since other people have the same problem, there is nothing you can do to fix it.
The simple alternative is to enter the information yourself in TurboTax rather than importing it. This works more reliably, and since you have online access to your account, you are likely able to get the information or form online. Of course you may want to work harder at it if you have dozens of stock sales to list!

Also note that some brokerages are just now putting up the documents. Schwab, for instance, says they'll have them up by tomorrow, although mine are already up. I didn't import them because I filled out the forms weeks ago. I'll just compare the actual form to my numbers to be sure everything matches, which will not require an import.