Just received notice from IRS of incorrect info in my 2021 taxes with a large amount owed. I have pdf of all forms and backup info, and am able to open that return in TurboTax (on my computer hard drive). But in neither case can I find the Form in question (8949) which the system help says is built from other information entered. But going back into Turbo Tax, I cannot find where individual transaction data from the Form 1099-B from my broker would have been entered. [It was not imported.] Since it was 2.5 years ago, I can't recall entering all the details manually, but I feel certain I would have used aggregated data, not individual transactions. But the IRS letter is showing individual transaction dates. I want to see what I entered (and preferably any prompts in the software for entering that information) in order to see whether the mistake is mine, and how it happened (especially since I might have made the same mistake for 2022 and would need to do an amended return). Can anyone tell me how to figure out how the detailed data got entered and communicated to the IRS (presumably on form 8949) and most importantly, how I can see it? Thank you.
