When I was living in Sweden, it was like that. I got a paper form with everything already filled, including income, loans, assets and so on. If everything was c

When I was living in Sweden, it was like that. I got a paper form with everything already filled, including income, loans, assets and so on. If everything was correct and you didn't have to change or amend things, then you could send a single text message (SMS) to confirm that everything was OK. Since estimated taxes are already deducted from your salary by your employer, you only have to pay the difference with that estimation. A few of the years they overestimated that a little bit, and I got the money back on my bank account within a month. This is how it can be.