Most likely it's too early ... usually this is not functional until mid February at the earliest ... check with the broker to find out when the import will be operational. And watch out ... if your account usually gets corrected statements it is best to wait for them before filing so you don't need to amend later.
See this TurboTax support FAQ for importing 1099's - https://ttlc.intuit.com/community/entering-importing/help/how-do-i-import-my-1099/01/26254
