Property Tax double entry. I already did the e-file and now I see that the property tax was entered twice. Entering the same amount twice should be a review error.

Once your return has been accepted, you can amend it.  How you tell TT that you want to amend a return probably depends on which version you are using.  For the Premier version I use, there is a button on the page that lets you continue a return or start a return and below that a button that says "Amend a filed return".  TT will walk you through the process of creating the 1040X.  Note that the amended return must be mailed and cannot be e-filed.