If the state return was accepted by the state taxing authority then you will need to file an amended state return. Please follow the directions below that pertain to a nonresident state return.
https://ttlc.intuit.com/replies/3302052
Follow the directions below to prepare your amended state return(s).
https://ttlc.intuit.com/replies/4653469
Note: Once you prepare your amended state return(s), you will need to mail them.