I had the same situation (all the RMD and more for both Accounts A and B was taken only from Account A). I used the TurboTax Deluxe Version. At the time I did my taxes back in February, I do not remember if TurboTax had applied all the fixes that may have come later. In any event, Part IX of the 5329 Form was filled in, I believe, as you describe, but I needed to manually complete Lines 52 and 53 at the bottom of this section, also as you describe (no correction needed). TurboTax did not detect an error when running the Checker prior to filing. Hopefully, the same will be the case when the IRS does it checking.
