If you don't have a filing requirement in Oklahoma and wish to delete the Oklahoma return, 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
