I don’t know why assume that in every country in the world that is free. In my European country until 15 years ago or so you had to hire someone to do your taxes for you, and currently the free method only works for the most simple tax filing. In fact what you get is called a “draft” of your tax filings because you’re supposed to make sure it’s okay, and it’s your responsibility if you miss something or if the draft is wrong.
And obviously the draft usually assumes that you will have to pay more tax, since there’s a perverse incentive given it’s the government who fills it for you.
Which country if I may ask? I have lived in France Switzerland and Ireland and haven't seen something like this, even though governments provide the tax filing software.
I wonder if the explanation actually had to do with these people who used to do the job 15 years ago influencing the process to ensure they remain relevant. Kind of like in the US actually.
And obviously the draft usually assumes that you will have to pay more tax, since there’s a perverse incentive given it’s the government who fills it for you.