Please follow the instructions below to make changes or add to your still as unfiled return:

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 opens the return back up)
5. Make changes and then refile.