The TN Department of Safety & Homeland Security has released parents/students from providing an SF1010 form when they go to get their permits (through October 2020). Instead, print and fill out the affidavit found here. More information can be found by visiting this link.
TN Driver's Manual- This link (to the left) will take you to the Tennessee driver's manual. If you scroll to page 7, you will see a table of documents that are needed when a student goes to get their permit test. The SF1010 form referenced in the manual is what the school provides (see info and link provided above).
Knox County Clerk- This link will show you information about the various DMV locations in Knox County. *You do have to scroll down a bit on the webpage and look for "First Time Applicants". This includes the various DMV locations and their hours.
I would encourage you to double-check with the location you plan to go to, to ensure they are open. The last time we called, they indicated they would be opening May 18th, but that may be subject to change (see the link above for sites and phone numbers to call).