I tell you how it works in my shitty eastern european country:

• I get an email that my report is ready, I have to go to a website where I can see it.
• After logging in I can see a list, where I worked last year, how much was paid, if I should pay anything more or I can get back something.
• If everything is alright I can hit OK. If something is not right I can open an issue on the same website, but I never had to do that ever.

That’s all. Usually takes less than 5 minutes for the whole process.