In France the employer manages your income taxes, and then for the vast, vast majority of people (I would guess 90%) the tax filing is a 2 minutes work.
I think that since last year if you do not file them, they are automatically filed for you according to the info the govt has
Same for Finland... Takes me 5 minutes to go and add deduction for using home office and half of the internet bill. And any peripherals I got for work...
And if I didn't have any of those, well I wouldn't even need to touch whole thing.
Ya most sane countries have a PAYE (pay as you earn) type system with no involvement at all from the employee unless they make money in other ways that they need to declare (investments, etc).
I think that since last year if you do not file them, they are automatically filed for you according to the info the govt has
EDIT: typos