Unlike most other cryptocurrency exchanges, Robinhood does not allow its users to transfer cryptocurrency into or out of its platform.
As of this writing, you can only buy, sell, and trade on the Robinhood platform. This allows Robinhood to provide users with accurate tax documentation unlike Coinbase and other exchange giants.
To properly account for your Robinhood trades, do not upload them into CryptoTrader.Tax. Simply navigate to Robinhood tax document section, and download your 1099.