I received my 1099 from robinhood yesterday, but when I enter in the account and document numbers it will not import. Is there a reason for this?

You may need to check your brokerage to see if they are allowing third-party access. Although the following Help Article is for Schwab, it is possible that your brokerage has restricted TurboTax's access to your statements unless you grant consent, and you might need to do something similar to what is described here How can I fix my 1099 import issue?