Do you qualify as someone's dependent? Did someone claim you? Here are the rules for claiming a dependent. Do you qualify as a dependent?
https://ttlc.intuit.com/community/credits-and-deductions/help/who-can-i-claim-as-my-dependent/00/267...
If you don't qualify to be claimed then you will need to print and mail your return and the IRS will determine if you can be a dependent.
It could be someone claimed you by mistake. Maybe they entered their ssn wrong and got yours by mistake.
How to mail a return from the Online version
https://ttlc.intuit.com/community/printing/help/how-do-i-print-and-mail-my-return-in-turbotax-online...
Be sure to attach copies of your W2s and any 1099s that have withholding on them. You have to mail federal and state in separate envelopes because they go to different places. Get a tracking number from the post office when you mail them for proof of filing.
