Many folks here did reference and supply IRS written instructions that say exactly the opposite - that when two or more numbers are used in a calculation they SHOULD NOT be rounded prior to the calculation and that only the result should be rounded. That evidence is here in these threads from last tax season (2021). You can go back and read thru them yourself. Of course folks on both sides insisted, and I suspect still do, that they are right...LOL.
Since, unlike last tax filing season, this tax filing season the totals and subtotals in TT after importing my 1099-B match exactly the totals and sub totals on my broker 1099-B (unlike last tax seasons. 2020, when they did not match) AFAIKT the problem in TT has been resolved so I'll bow out of this discussion. Good luck.
