I am trying to change and update the property tax amount and I am trying to add car registration fees (California), but each time I get a blank page.
You need to run TurboTax as an administrator. if you do, the problem will be fixed. if you do not, you will see blank screens.
.... this is the likely issue with anyone with a blank page during the running of Desktop TTX software.
.......TTX should only be installed and run as an Administrator..not in some guest account without administrator privileges...but it's hard to know each person's exact setup.
1) right click TurboTax 2018 icon
2) Select … Properties
3) Select the Compatibility tab
4) In the "Settings" box … check the box to "Run this program as an administrator"