Earlier quoted context omitted.
This is by design. Income tax filing is a long-solved problem in much of the first world. One of the easiest ways to convince the public that the government is inept and wasteful is to make it as difficult to do the necessary as possible. If politicians cared, this wouldn’t be an issue.
Basically nothing is going to happen to you if you make a best effort. So many people focus on getting it correct and pay hundreds or thousands to do so. I've filed my taxes incorrectly by accident for years and the IRS just sends me a correction and the new amount
This results in a lot of K-1s, which tax preparers charge you like $500 a form for, except all of mine had values like $2.
Luckily you just kind of do it halfway right in TurboTax and it works out.