.... this is the likely issue with anyone with a blank page during the running of Desktop TTX software on a Windows computer.
.......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.
Exit TurboTax....then:
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"
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This has fixed the problem for a number of users now.
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*