Comment by BrandoElFollito
3 months ago
I do not even understand the terms you are using. In France (and other EU countries), "figuring out taxable income", "standard deduction", "subtracting credits", etc. are not your concerns.
The web page has all this information, you say OK and you are done. There is not a single "figuring out" you need to do.
This is, of course, the case for 95% of the population. You can be in the 5% where your tax filing becomes very complicated. In that case, though, you give this to a CPA and the cost of this service is zero compared to the amount of euros you deal with.
The IRS has no idea what deductions and credits are applicable to you and has no way of finding out. They could maybe prefill your reported gross income but then they’re at a loss.
In other countries there are such things as national citizen registries with domicile and familial information, this doesn’t exist in the US. If it did you could use that information to get much more of a start.