[throwaway10507]

In most of EU, the tax authority first asks you nicely to fix your mistake, and only if you don't, they confiscate the owed amount plus a small fine (given that it's your first offense and they don't see it as intentional fraud).

I used to have my life in serious disorder and they confiscated the owed tax three times from me. Never got fined more than $100, though I had to call and apologize the second and third time to have it reduced from ~$500.

[raverbashing]

Yeah, you're paying the tax owed, not much way around that unless you have allowed deductions or something else

But the higher fines/criminal charge are usually for very, very egregious failures to pay