If you have business income that was paid either by cash, check or credit card, see the steps below to enter that income onto Schedule C in TurboTax.
Type Schedule C in the Search box and then select
the Jump to link. This will take you to
where you can enter any cash, personal checks, credit card payments, or
cryptocurrency (Form 1099-K) related to your self-employment. You may
first be asked some general questions about your business. After you answer
them, you’ll be taken to the Let's enter the
income for (your line of work) screen where you can enter this income as
Other self-employed Income.
See the sample screenshot attached.