Yes, if you are working on another return that has a State included, you can delete that state from one return without deleting it from TurboTax.
TurboTax creates a unique .tax2018 file for each return you work on, with appropriate states included.
Click on the State Tab and Continue.
You will see which states are included in the current return, and which ones have been 'installed' in TurboTax (screenshot).
Yes, if you are working on another return that has a State included, you can delete that state from one return without deleting it from TurboTax.
TurboTax creates a unique .tax2018 file for each return you work on, with appropriate states included.
Click on the State Tab and Continue.
You will see which states are included in the current return, and which ones have been 'installed' in TurboTax (screenshot).
Here's 2 articles I found
How to delete a state in the Online version
How to Clear a state in the Desktop program