Robinshood.com is still working to set up the TurboTax import function. This if from Robinhood.com:
Importing Trade History to TurboTax
We’re still fine tuning our integration with TurboTax to give you the best experience possible. When that’s done, we’ll be sure to post detailed, step-by-step instructions on how to import your tax documents from Robinhood. Stay tuned for updates!
The link is below if you want to refer back to it to watch for updates.