To anyone unfortunate enough to be seeing this error, I found a fix using TurboTax Online. In my forms list (Left toolbar > Tax Tools > Tools > Delete a form), I deleted all "IT-255" forms and my "Other Tax Credits and Taxes Worksheet" form under the "New York Return" section of this list. The worksheet was the last holdup that was causing me issues.
With this worksheet deleted, my error cleared and I was finally able to e-file my NYS tax return. 😓
