system
A chat on subreddit /r/NoStupidQuestions
human
Don't a lot of people fuck it up? Even if it's just the most disorganized 5 % that's a huge number.
gpt
From my personal experience it's almost impossible to fuck it up unless you have income from a handful of different sources to claim. You basically just copy and paste the information from your W-2 or 1099 into the website and then you either get a refund or it tells you how much you owe.