Speaking from a European country, employers are reporting salaries to the revenue service. The banks are reporting capitial gains from taxable accounts. So bas

Speaking from a European country, employers are reporting salaries to the revenue service. The banks are reporting capitial gains from taxable accounts. So basically the only reasons for filing taxes are for exotic revenues (for example crypto !) or to ask for exemptions. Free lancers still have report their revenue themselves but I would say that for a very very vast majority of people, they already have all the information needed. Actually we receive our forms with some fields (salary for example) pre filled, you only have to check if this is correct. The tax form is just some kind of confirmation, most of the time.