I'm finding several business entities listed on my account that I have no knowledge of! How do I report this?

Did you enter any Forms 1099-NEC or 1099-MISC? If so, TurboTax may have created businesses for those entries. You'll need to either complete the business set up or change your 1099 entries.

If you're certain the businesses should not be on your return (and weren't transferred from last year's return), you can delete the related Schedules C and worksheets. 

See:

• Does a 1099-NEC or 1099-MISC mean I'm self-employed?
• How do I view and delete forms in TurboTax Online?
• How do I delete a tax form in TurboTax Desktop?