How do I enter information from self employment?

IRS website - https://www.irs.gov/businesses/what-to-do-with-form-1099-k#use

You may get a Form 1099-K if you received payments through payment cards, payment apps or online marketplaces.

These transactions can include payments you received as a gig worker, freelancer or other independent contractor (self-employed). This may also include payments you received from selling items as a hobby.

If this was income you received from self-employment then that income is reported on a Schedule C.

TurboTax support FAQ for entering self-employment income - https://ttlc.intuit.com/turbotax-support/en-us/help-article/self-employment-taxes/report-income-self-employment/L5wADi3xQ_US_en_US?uid=lze7ovii