87% of tax filers could have their taxes filled out by the IRS because they IRS already has all the information.
And marriage and death records are public, as are probate. So they would have all of that too.
Or simply ask you if the most common situations apply to you, just like turbotax does.
The IRS could send a tax bill for what they do know, with an option to agree that is all you owe and pay, or an option that you will need to file the taxes yourself because they are missing information.
For the vast majority of Americans, option 1 will cover them.
I'm not saying a company like Intuit adds zero utility, I'm just saying that I think a lot of taxes are simple enough to where it would be relatively easy to just give people a default thing. If the IRS gets something wrong, or is missing some info, then I think a software like TurboTax makes a lot of sense, but isn't that much more of an edge case? Fundamentally, the complexity of my taxes didn't really change in the last five years.
But the IRS still knows about them.
Also they could put a website where you could spend five minutes entering the most common information they don't already know, and then spit out your bill.
It's not that hard. Most filers situations aren't that complicated.
That's basically what they're doing.