How do I carryforward investment fraud losses (from 2016 to 2017)?

We lost a significant amount of money in 2016 due to investment fraud ($825k). It shows up as a "fraud and casualty loss" in my 2016 return.

Unfortunately, my accountant has significant health problems and I haven't been able to get a hold of her for 18 months. It turns out my 2017 return was never filed so I'm scrambling to do them on TurboTax Home and Business (desktop). How do I apply this fraud investment loss as a carryforward?

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