Did you answer Yes to the question "Someone else can claim me as a dependent on their tax return?"
Here are the steps to get to that question and verify your answer:
Sign into your account and click Take me to my return
Select My Info (in the left column)
Select Edit next to your name
Scroll all the way down to A few other things we need to know and verify your answer to the first question. If your parents have claimed you, you will want to answer Yes.
Here is a TurboTax FAQ with more info about Rejection Code IND-516:
https://ttlc.intuit.com/replies/5947691
