As I mentioned before, I have two TD Ameritrade accounts with identical setup (never changed). Today, I was able to import for one account (if it matters, with alphanumeric document ID). But got stuck with document ID format error (which is all 11 digits). So something like “enabling third-party access” is most likely not going to help. And, if my memory serves me right, last year when I prepared for 2020 tax return, my two TD Ameritrade account imports beautifully the first time. No problem whatsoever. If this is not resolved soon, my last resort will be entering all 6 pages of my 1099-B manually...😭
