Open your return and type Schedule C in the Search box. Select the Jump to link.
How to enter income from Self Employment
https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/26653
All self-employment income and expenses is entered under the Business tab in the section of Business Income & Expenses (SCH C).
The Online version does not have a Business tab. That is only in the Desktop Home & Business version.