Most returns are not audited, and most screw-ups don't result in fines. The kind of thing that (sometimes) gets big fines is sophisticated shenanigans done by r

Most returns are not audited, and most screw-ups don't result in fines. The kind of thing that (sometimes) gets big fines is sophisticated shenanigans done by rich people, and completely preparing such a complex return is (imho) way out of scope for the 'tax automation' we are speaking about here, where a basic 1040A or 1040EZ (simple forms which a massive plurality of Americans are eligible to use) can be populated entirely from IRS-known data.