Taxes in Sweden are generally effortless. Deductions, investments and benefits are often generous and easy to file. Unfortunately if you are more modest the story is a bit different.
It is great if you are established. You might have a big house, high maintenance costs, use cleaning services, invest a lot in the stock market and other things that comes with all that. Because not only is it easy but you get a lot of public benefits as well like health care, affordable student loans and mortgages, cost-free education and kindergarten, sick leave and affordable private additions to many of those. You can even use the ease of that to do things like start a company on the side.
For us that are more modest and don't have a lot of assets but mostly want work, get health care and do something else once in a while, it is still a good system. I once checked and approved my taxes in the middle of the night, from a bar, in China. But overall there isn't as much benefit. If I don't want to pay a higher tax rate than those who use all those deductions and want some flexibility in how I use my income (which I honestly rather wouldn't) I need to start a company. But then I would have to file much more complicated taxes and therefor get much less enjoyment from taxes being easy for personal income. Still by not doing so I am giving up tens of thousands of dollars a year.
So while I am in no way suggesting that the US system is better or even comparable, the Swedish tax system today have many of the same overall problems. And that is unfortunately more and more true of other systems as well.