You shouldn't have had to pay tax, based on the information you provided. I'm not familiar with all the details in entering data in TT, but you must have missed a question or a check box in entering the sale of your home. Have you all ready filed the return and it has been accepted by IRS?
If so, you should amend the return by filing 1040X and correct that error and get the extra tax back. Here is a link to pub 523, selling your home
https://www.irs.gov/pub/irs-pdf/p523.pdf
**Disclaimer: Effort has been made to offer correct information; but due to the discussion forum limitations, the poster disclaims any legal responsibility for the accuracy of the poster's response**
