You can put the expense for sub-contractors in the Inventory section, which is just after the Income section.

Does this apply to both US & Canadian versions? Because there's no inventory section on Canadian turbotax under self employed - just a new section to include expenses that mostly aren't relevant.

I can put them under "professional services" in expenses, that's about it. If you happen to have a link or an image or video of where the inventory section would be it would be appreciated. 

When you entered yourself as self-employed- which did you choose- professional or business? 

Thank you for choosing TurboTax.

I am also having issues finding where to put this info in (amounts paid to subcontractors) in the CA version online.

I am filing as self-employed income with a business.

Please make sure that you have answered yes to the question "Did you sell products that you bought or manufactured?".