* H&R Block and Intuit have good lobbyists who prevent it from happening.
* Republicans want to make filing taxes difficult so that people won't like taxes. In particular Grover Norquist has managed to get essentially all federal level Republican politicians to sign a pledge not to raise taxes, and Norquist considers making filing simpler to be effectively raising taxes.
https://www.politico.com/agenda/story/2018/07/18/tax-filing-...
So basically the only reasons for filing taxes are for exotic revenues (for example crypto !) or to ask for exemptions. Free lancers still have report their revenue themselves but I would say that for a very very vast majority of people, they already have all the information needed.
Actually we receive our forms with some fields (salary for example) pre filled, you only have to check if this is correct.
The tax form is just some kind of confirmation, most of the time.
Filing tax forms is almost always a good idea for salaried workers because of the plethora of expenses that can be deducted from your taxable income:
- handyman bills
- expenses for the commute to work
- donations to political parties and registered charities (I save 400€ in taxes on that item alone because of regular donations to my hackerspace)
- some types of insurance premiums
- etc.
For example, we don't have a simple tax system based on a percentage of salary. The amount they want as a tax depends on your marital status, how many kids, how much your spouse earns, and if you itemize deductions it gets even worse WRT every medical provider's bill you've ever paid and weird details of interest payments on mortgage loans.
Honestly the error rate of trying to gather all that big brother data is almost certain to be higher than the fraud rate of people in general.
Also people push agendas, so if you want to spread the idea that fraud is rampant, if I get free coffee at church and starbucks has proven 52 coffees per year is about five hundred bucks, not declaring that coffee as income is fraud; with paper money and barter the IRS can't get all "weird" about little details, but with digital currency if you buy a donut, there will be a reckoning simply because its possible.
The $20 gift from grandma is exempt, but not because they don't demand insight into intra-family transfers.. it's only non-taxable because of its size. If you have a rich grandma and she gives you $20k, that needs to be reported.. even if no tax is ultimately due, it probably reduces the future value of her estate tax exemption. Dying is a very complex taxable event!
If you want to follow the thousands of pages of rules to the letter - sufficient to sign a letter declaring under penalty of purjury, etc - the tracking and compliance burden on many US taxpayers is enormous, even with assistance from the commercial closed-source SW packages that you are more or less forced into buying each year because they won't let you e-file with them directly over HTTPS+JSON or whatever.
There's a recent Planet Money podcast on it. The regulatory lock in for tax filing is ridiculously profitable, and companies like Intuit certainly rent-seek to solidify their revenue stream.
https://www.npr.org/sections/money/2017/03/22/521132960/epis...
Even if the IRS had perfect info about all your income and investments, there are decisions you can make which effectively make taxes non-deterministic. Suppose on two different dates, you bought shares of a company. Then on a later date, you sold one share. You get to choose which purchase date to count the sale as being against. This is important because you pay on the profit made based on that assumption. It also effects whether you pay short-term or long-term capital gains taxes for the sale.
Say for example you bought 1 share for $100 two years ago, and another share for $500 one month ago. One week ago, you sold one share for $1000. If you count it as selling the $100 share, then you must pay taxes on $900 in profit, BUT you enjoy the lower long-term capital gain tax rate. If you count it as selling the $500 share, you must pay taxes on only $500 in profits, BUT you suffer the short-term capital gain tax rate. Which of the two should you do (if you're a hypothetical perfectly rational actor who always makes absolutely optimal decisions)? Depends on what you plan to do with the other share, what you think is going to happen to the stock price, and so many other factors you could write a 10,000-page book about them...
(This of course is all US tax code, not applicable to US states or other countries.)
If it's transaction-time then that's totally unenforceable since this discussion applies to things as diverse as trading physical goods for other physical goods in an ad hoc unrecorded environment. It would make no sense for it to automatically be FIFO anyway, for example a person with amnesia might temporarily forget their ownership of longer-term holdings.
And for just one example where FIFO would be suboptimal despite a rising market, merely suppose that you know you're about to die and your children are about to inherit everything with a higher cost basis, but you need a bit of cash right now. (I highly doubt tax optimizer software has achieved the strong AI that would be necessary to know if you're about to die.)
You can't start talking about other capital gains in the same sentence as regulated securities as the reporting requirements are going to be different.
Perhaps you're trying to make a different point now, or I misunderstood your original one.
You can already contest how much the IRS claims you owe. Why would this hypothetical be any different?
Yes, it's probably impossible for the IRS to perfectly account for every American-person's income. They already make mistakes and it's not terribly difficult to show them how they got it wrong. Whether they are incentivized to adjust to your lower claimed liability is another question... but that's why we have independent courts.
That stocks and some types of deduction means it needs amending to be “optimal” is pretty clear.