I have tried to mass deploy Parallels Desktop as a step in the Task Sequence. But mass deploy Parallels Desktop step was failed.
Parallels Desktop system (kernel) extensions were automatically blocked by the new macOS High Sierra security feature. See Apple's KB Prepare for changes to kernel extensions in macOS High Sierra for more details.
You need create an additional Execute Script step in the Task Sequence with the command to approve Parallels Team ID:
spctl kext-consent add 4C6364ACXT
The step must be executed before Apply OS X Image step:
NOTE: If you are using mobile device management (MDM) service, all systems with a valid MDM profile installed will not require user approval to load any properly-signed kernel extension.