It does not matter that you did not get a 1099K----you still have to enter any self-employment income if you have over $400 of self-employment income.
If you have self-employment income for which you will pay self-employment tax for Social Security and Medicare, you will need to use online Premium software or any version of the desktop software download so that you can prepare a Schedule C for your business expenses.
https://ttlc.intuit.com/community/self-employed/help/what-is-the-self-employment-tax/00/25922
If you live in a state with a state income tax, you might need to make estimated payments to your state.
https://turbotax.intuit.com/tax-tips/small-business-taxes/the-home-office-deduction/L1RZyYxzv
https://turbotax.intuit.com/tax-tools/calculators/self-employed/
To enter your self-employment income not reported on a tax document: