2023 Turbotax Desktop Premier downloading Fidelity 1099 info.
I got to where TT said it would connect using my default browser. Fidelity login did come up in my default browser.
I did enter my login credentials into the Fidelity window. I got
"The page you requested is currently unavailable. Please try again later."
The TT-launched intuit.com browser window said
"Fidelity Investments
We couldn't complete your connection.
Try again or go back to select a different account provider. (571)"
I went back to TT and tried again and again. Nope.
My suspicion that some setting I made on my default browser was interfering with the operation.
My workaround was to temporarily make a different browser my default -- a browser that I had not tightened up and still used total defaults.
Going back to TT, after a few times just telling TT to try again, I went back to an earlier point in TT. This time it worked. Launched a Fidelity login into my temporarily default browser. Got the message that the info had been downloaded. Success!
I followed that by deleting cookies and history from my temporarily default browser. I went back to my usual browser, and made that the default again.