>>9925955i don't know how it is in other countries but american taxes are quite crazy when you think about it.
the government knows the right numbers for everything and how much you/they owe but you have to fill it all out yourself anyway and if you get it wrong or don't do it in time it's a federal crime. the exception being if you made under a certain amount where they almost assuredly owe you money instead of the inverse, then you can choose not to do the math to figure out that they owe you money