In order to assist you properly, can you tell us which version of TurboTax you are using; Online or Desktop?
If you are a Self-employed person, you have this in Self-employment income section. When you created your business profile, you should have selected the Type Business (allow you to enter inventory and sell goods).
In the Income section, on the page it asks this: Did you sell products that you bought or manufactured? You must select YES, and you will have the field Cost of subcontracts hired
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