If your tax return is wrong and you think the IRS bill is correct, then pay the bill. That is what is owed.
If you think the program had an error, you can make a claim to get any penalties and interest reimbursed by TurboTax (see link below and the associated links for more information). However, in most situations this type of thing is because you accidentally entered it twice. Common mistakes are entering two mortgage interest statement, entering it in the Home Office section AND the personal expense section, and entering it in the Rental Section (as an owner-occupied rental) AND in the personal expense section. So if you have a Home Office or an owner-occupied rental, you may want to look into those sections.
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