Hi hilda0928 - IND-516-01 happens when your SSN has already been claimed as a dependent on someone else's return. Do your parents claim you on their tax return? If so, on your return, you need to indicate that you were claimed by someone else. See this article for more information about how to fix this reject.
https://ttlc.intuit.com/questions/3753697-rejection-code-ind-516-if-the-primary-taxpayer-is-claimed-...
