Typically you would add all your sub-contractors as suppliers under
When your subcontractor gives you an invoice, you record it under
Purchase Invoices tab.
When you pay subcontractor, you match the payment against subcontractor accounts payable account.
Basically you treat subcontractors as any other supplier who is providing their products or services to you on credit.
As far as I know, in Quickbooks, you would set up subcontractors as vendors and mark them subject to 1099. Then Quickbooks would let you print 1099 reports for each transaction. Manager doesn’t do it yet but if there is enough interest, it’s not difficult to implement. If you have smaller number of transactions, just going through purchase invoices of suppliers subject to 1099 can give you information needed to complete 1099 manually.