It's possible the MFA could be affecting your import documents loading. Have you tried temporarily disabling it? If you can Sign In to your account outside of TurboTax and get a PDF copy of your 1099's downloaded to your computer, you can make one entry for the totals for 1099-INT/DIV in those sections.
For your 1099-B's, here's How to Enter a Summary in Lieu of Individual Transactions as a workaround if you can't get your import to work.
The IRS already has copies of all your 1099's, and they actually only need you to report your total Gain/Loss and whether ST/LT on your tax return.
Here's how to Contact TurboTax Support and also how to do a Manual Update.
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