If your father did not have any presence in or connection to either New Jersey or New York and you wish to delete those state returns, you can delete a state return in TurboTax Online, as long as you haven't paid for it yet (or registered in a free version).

Please see the following TurboTax FAQ, "How do I delete my state return in TurboTax Online?":

https://ttlc.intuit.com/replies/3301384