As an American, it is bonkers to me too. Last year my former employer did not issue me a w-2. I called the IRS to ask them what to do. They said they had all the information but can’t release it to me until after the filing deadline. Instead I was told to use form 4852 to estimate and file an amended return if my estimate was wrong once they give me the numbers they have. Worst part is you can’t efile when you file with form 4852.

Anyway, my point is that for 95% of people they have all the information already and you shouldn’t have to file.