I'm from the Czech Republic so I'll tell you how would that work here.
Each year you have to submit a tax return - a paper where you admit how much money you earned in the last year. If you are an employee and you have just one source of income, it's usually done by that employer.
If you would have another income (there is also some treshold) you have to do it yourself and add this income to your salary and pay taxes. It's not that complicated.
Each year you have to submit a tax return - a paper where you admit how much money you earned in the last year. If you are an employee and you have just one source of income, it's usually done by that employer.
If you would have another income (there is also some treshold) you have to do it yourself and add this income to your salary and pay taxes. It's not that complicated.