Beware of all the "solutions". I'm not convinced there really are any.
There are hundreds, maybe thousands of us trying everything we can think of to get the import to work. Eventually it does, and whatever the lucky user tried last is credited with the win.
But in many, and maybe all cases, it's just a coincidence. An anecdote. "I did X, and it worked." Anecdotes can be useful especially when they accumulate and a pattern emerge. In my case I didn't do anything except keep trying and eventually it just worked. No clue why. Quitting TT between tries was not necessary.
A genuine solution is one that can be reliably reproduced. Do X, it works. Fail to do X, the import fails. I have not seen any such solution.
Granted, third-party access has to be turned on at Schwab. I'm sure that no one has a successful import without that. But most of us likely had that turned on to begin with. I have seen nothing to convince me this is a Schwab problem and not squarely in Intuit's court.
