In TurboTax, you can amend your state return without filing an amendment for your federal.
But, if you need to amend your federal return, the changes that you make to your federal return will automatically be transferred to your state return.
If you only need to make specific changes to the state return, review the directions for either TurboTax Online or TurboTax CD/Download.
Select your version for instructions:
If you need to amend a prior-year state return, visit this article for more info.