I input the incorrect property taxes and cant edit the field now?

[JulieS]

Yes, you can edit the amount, but only in the first place you entered it. For most people that is in the mortgage interest section.

Check here to see if you can edit your property taxes:
 

1. Open your return.
2. Select Federal, then Deductions & Credits.
3. Scroll down to Mortgage Interest and Refinancing (Form 1098), select Edit.
4. Select Edit to the right of your 1098-INT entry. 
5. Continue until you get to the screen titled, Let's get the details from your 1098.
6. You should be able to edit the amount under Property (real estate) taxes.