The work you described must be reported on Schedule C (Profit or Loss from Business) of Form 1040 - that form requires you to use TurboTax Self-employed (online) or Home & Business (Desktop CD/Download).
If the sites you work for do not provided tax reporting documents (1099-MISC or 1099-NEC), you will have to keep track of your receipts manually and enter them as General Income.
See How do I report income from self-employment?
