If you are self-employed and had even $400 of self-employment income, you need to pay self-employment tax for Social Security and Medicare. As for whether you will owe ordinary income tax as well depends on how much you earned. You still need to pay the SE tax even if you can be claimed as a dependent. On your own tax return in My Info, you must say that you can be claimed as someone else's dependent.
https://ttlc.intuit.com/community/self-employed/help/how-do-i-report-income-from-self-employment/00/...
https://ttlc.intuit.com/community/self-employed/help/what-is-the-self-employment-tax/00/25922
https://ttlc.intuit.com/questions/2902389-why-am-i-paying-self-employment-tax
https://ttlc.intuit.com/questions/1901340-where-do-i-enter-schedule-c
https://ttlc.intuit.com/questions/3398950-what-self-employed-expenses-can-i-deduct
https://ttlc.intuit.com/questions/1901110-do-i-need-to-make-estimated-tax-payments-to-the-irs
https://turbotax.intuit.com/tax-tools/calculators/self-employed/
If you use online TurboTax, you need to use the Self-Employed version. If you use the CD/download you can use any version of the software. You will be preparing a Schedule C for your business expenses.
Or—-Use this IRS site for other ways to file for free. There are 8 free software versions available from the IRS Free File site
https://apps.irs.gov/app/freeFile/
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
