there's no way to know since we know nothing about your taxes and have no access to your returns. even if there was access there may be no way to tell if you missed anything. you can upgrade to have a pro prepare your Turbotax return. That does not mean they'll find anything to produce a refund. If you use Turbotax to prepare your returns and go through every step in the interview process properly answering the questions, it's unlikely anything was missed.
