After you file

I got a letter from the IRS stating I owed another $2K plus. When I checked the numbers on my return, I had the same numbers they did, but Turbo Tax said I was due a refund and the IRS says I owe the extra money. It appears Turbo Tax screwed up my taxes.  What I paid in taxes was the $2K plus less than what was owed by both the IRS and Turbo Tax.