It’s also FUD about how complex, or really how simple, doing your own taxes can be. Filling out a 1040 for the overwhelmingly common situation of a single job is a cake walk. The vast majority of people would be taking the standard deduction now as well.
They answer that in the NPR podcast the parent linked to. But it essentially boils down to the fact that taxes are constitutionally voluntary yet tax evasion is illegal.
I'm no constitutional scholar but I don't think the IRS is constitutionally prohibited from sending me a filled out tax form and asking me if it's correct.
"The Congress shall have power to lay and collect taxes on incomes, from whatever source derived, without apportionment among the several states, and without regard to any census or enumeration."
They do anyway. One year, I must have screwed up my return, because I got a letter from the IRS saying: We think you screwed up, here's why, send us X amount, and we're good. Or you can file an amended return.
FYI those letters are, afaik at least, typically grossly overestimated. The number is meant to scare you into calling a CPA to straighten it out, essentially. So for anyone else with the same kind of letter, don't just pay unless you know that it's correct ahead of time.
Thanks for that tip. In our case, the error was due to a missing form, and when I corrected it in Turbo Tax, my number was close enough to the IRS number, so I called it a day.
Same answer of course.