Deductions & credits

Thanks for the answer.  I can see that the overall tax line (12a) says zero, but TurboTax initially calculated exactly what cap gains I owed after I submitted the info about the sale of the house.  For some reason, things didn't automatically carry over within TurboTax to populate line 12a, or I missed a step to input this.  I wasn't sure of the process, and I filed yesterday (it was accepted), so it looks like I'll have to amend the return now.  WHERE do I input the sale of the asset?