After you file

I have the same question.  I just filed today.  My taxable income was $57,000.  Turbo Tax said my federal income tax was $2,000, getting me a large refund.  However, the IRS tax tables show the tax should have been $6,500.  I can see no possible reason for the lower tax.  I believe it is an error that will come back to haunt me with penalties and interest in the future.  How do I deal with this??  Thanks.

 

Rich W.