Upwork Transactions

Hi Everyone, I have a problem recording Upwork transactions. In previous accounting software, we recorded Upwork invoices as Subcontractor cost since we often work with freelancers, tutors and other specialists in various subjects in order to provide services to our students. We are providing educational support and tutoring services. What category of expense to choose from chart of accounts. There is no "subcontractor expense" in quickbooks online. Thank you.