The US government has zero power to change any of this.
(1) In many of those cases, state/local filing requires very small additional paperwork plus same-year federal forms.
(2) In many of those cases, the same thing the IRS could do for federal forms could be done by state/local tax authorities for their own forms.
So, solving the federal case both solves most of the problem and provides a template for solving most of the rest of the problem.
States' tax laws are not just federal taxes on a different form. They're independent tax systems with different legislation and different judiciary. Maybe in some states the tax code is simple enough that it can be filled entirely from information on your federal taxes, but this is often not the case.
Like my taxes are relatively simple, so my state taxes are just a few calculations using my taxable income from the federal 1040, and then also I have to attach any federal schedules I filed. Having the completed 1040 and printable schedules would reduce the state filing down to a few minutes of work.
My tax situation is not complicated and my state filing is 11 pages, plus 8 pages of worksheets. Federal schedules are not accepted, my state has similar but slightly different counterparts.
I guess I wouldn't want Michigan to not implement an even easier system just because some other state requires more complicated calculations.
That's all that is being talked about with #1.
> I don't think it makes any sense to have what amounts to a nationalized TurboTax that interprets tax laws outside of their own jurisdiction.
No one is suggesting that.
> States' tax laws are not just federal taxes on a different form.
Typically, a component (often the main component, with the state firm being smaller to capture special situations that cause variations) of state tax filing is exactly federal tax documents (not on a different form.)
Getting the state to prefill their own forms is a separate policy decision, but it's generally smaller impact in time/effort per filer as well as smaller impact in # impacted.
"we don't even have income tax" to "copy over a few lines, multiply by this fixed number, and we have 5 other possible deductions" to "we have our own forms for everything, and you need to file a separate local tax return"
And heaven forbid you have any part year returns with a couple of states like the latter.
My point is that the whole system is inherently a mess and even if federal returns were automated, many people would still be spending considerable amounts of time preparing taxes.
And even then, the only difficulty I had was doing CA nonresident taxes, because it turns out that there's a weird collision with CA and a few other states for nonresident taxes, the other one being the state I lived in at the time. And CA's instructions doesn't tell you about needing the other form unless you read the instructions for that form in particular.
The US system is just terribly implemented and there's no excuse for it.
See my sibling comment: https://news.ycombinator.com/item?id=31075655