Welcome to the Community space, @mrm100000.
Right now, importing contractors in QuickBooks Time is not an option. In the meantime, you can import your contractors as vendors. Then, import vendors as employees.
For more information about this process, you can check this article: About QuickBooks integration preferences in TSheets. Then, go to the Other Options section, then look for Import Vendors as Employees.
You're always welcome to post here if you have any other questions or concerns. I'll be around to answer them. Take care and stay safe.