why would turbo tax not fix it since they were paid to do
TT is a primarily a DIY computer program, and you are paying for the use of it. While TT does guaranty the accuracy if its calculations; it cannot know (for example) if you made a data entry error, forgot to claim some income, or claimed some invalid deductions/credits.
For example, you might have said you did not receive stimulus #3, but the IRS records indicate that you did. That would cause a delay while the IRS looks into it.
