Appreciate all the comments, but in spite of trying at least a dozen times, using 4 different browsers, with clearing all cache and cookies and history, I was never successful this year (2024). Ultimately had to enter the data manually, but then had to snail mail in a hard copy of Form 8453 with date acquired & sold, cost basis, gain or loss for each sale, etc. for every transaction. Not an excessive pain, but certainly eliminated the "ease" of doing everything on line with TurboTax. I'm not convinced Intuit seriously investigated the issue. And Schwab knew of no reports of issues on their side.
