It's hard to say, but it happens occasionally. Close TurboTax, then try clearing your browser's cache and deleting your cookies -- this will sometimes facilitate a complete import. See the TurboTax Help articles How to clear your cache and How do I delete cookies? for guidance.
Then, close the browser, re-open it, and open TurboTax Online again.
Finally, make sure you're only downloading information from one brokerage at a time.
If these suggestions aren't helpful, see the following TurboTax Help articles for potential fixes:
Thank you JohnW152. I tried clearing the cache and cookies, but that didn't help. My daughter solved the problem for me, though....
I am using the Brave browser, and that is a critical fact which I did not put in my inquiry. What worked was to click on the Brave icon at the top of the screen, and then PULL DOWN the Brave Shield while I did the broker downloads. Now I can continue on TurboTax (desktop version) using Brave while the shield is up again.
I hope that helps other Brave browser users!
Carolyn