If mistakes are found on your return, it may be rejected. The rejection would be something you would have to fix. I hope this helps.
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if you let the program review, it will tell you what it doesn't like.
You have to make the changes.
That's a good thing because TurboTax is not smart enough to know your intentions.
If you work with a Live person, it is probably the same (I never tried it)..
They will point out issues and work with you to fix them.
I think there is another option this year to let the Live person make changes.