Earlier quoted context omitted.
About two weeks ago, I got a letter from the IRS telling me that I owe an extra eight-thousand dollars from my 2020 return, with a $1000 fine and $200 interest as a result. [1] I'm not mad about owing the money, but what annoys me is if they have enough information to know that I underreported, then why am I part of this equation to begin with? Clearly they have enough of my tax data to know I screwed up, so why don'…
As others have noted, the IRS doesn't know everything, and some things may be to your advantage to report to them. They could send you a bill and ask you to fix it, but many people wouldn't know where to look to find mistakes. For example: RSUs and NQSOs (employee stock grants) are in my experience handled extremely poorly by default. If I have RSUs vest when the stock is worth $10 a share, then I pay income tax that…
Then people in that situation can do it from scratch like they're already required to do now. This is really not an issue anywhere else - this change wouldn't make the process harder for anyone.