To update the property tax you paid: 

Sign into your account, and click Take Me to My Return

Click Federal on the left side-bar

Click Deductions & Credits along the top

Scroll Down to Property (Real Estate) Taxes and click Start or Revisit

You can also go into forms:

• Change from step-by-step to forms located on the top right of the screen
• Click on schedule A on the left side-bar
• Click into line 6 to make the magnifying glass appear
• Click the magnifying glass to go to the supporting form (please see screenshot)
• In the blue box on line 2a of the Tax & Interest worksheet you can enter the amount you paid (please see screenshot) (clicking on the "plus sign" allows you to make several entries, for example if you had more than one home)
• Click on "Close Form" for that form (located below the worksheet)
• The amount you entered on the worksheet will flow to the schedule A (please see screenshot) 

[Edited 03.19.18 |4:00PM]