How do I get my money back from the IRS after turbo tax errored on the tax return calculation?

[rsgudyka]

After filing, I went to copy my return for my advisor and found that the amount owed was much less than I had paid already to the IRS.  The difference appears to be that turbo tax used the standard deduction instead of using my itemized entries.  How do I get my money back?

[fanfare · Accepted solution]

Use Form 1040X to add or correct information on an already filed tax return.

[SweetieJean]

Not all itemized deductions count at 100%. What type did you enter?
Is your advisor aware of the $10,000 cap on State/Local/Sales/Property taxes?
Did you indicate that your mortgage was secured by the property?