Can i file my state taxes. i did my federal already

Yes - you can go back into TurboTax and prepare your state return.  You will be able to e-file the state return when your federal return has been accepted.

To get back into your return after printing or e-filing, please follow these steps:

1. In TurboTax Online, sign into your account.
2. Select Tax Home in the left menu.
3. Scroll down to Your tax returns & documents.
4. Select 2018, and then select Add a State (you're not actually adding a state, this just gets you into the right menu).
5. Once you're in your return, you can navigate around as usual.
6. Click on the State link in the black bar on the left of your screen.
7. Complete your state return and you will be able to e-file it.