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Here is a Quick Guide. on how to configure your quizzes/exam to show score/result and feedback to your students.
There are some restrictions to your TA's access in the course regardless of the access level he/she is holding.
Your TA will not be able to access the course's Zoom configuration. Thus, you have to configure it for the course.
Your TA will not be able to configure Turnitin for the assignment dropbox.
Note: TA(Assignment/Dropbox) access level will be able to create/modify assignments but will not be able to configure Turnitin.
Your TA will not have access to the course's gradebook.
For more information, you can check out the FAQs section in this link.
You may also refer to this guide for more details.