Final answer:
The part of the sentence that needs to be changed in order to demonstrate correct parallel structure is 'past the vision test' which should be changed to 'pass the vision test'.
Step-by-step explanation:
The part of the sentence that needs to be changed in order to demonstrate correct parallel structure is: past the vision test.
It should be changed to: pass the vision test.
The corrected sentence would be: In order to get a driver's license, the applicant must pass a written test, pay a fee, pass the vision test, and have a thumb print.