T2 RSI #0230150 - The instructions say enter "NR" for a corporation that is not registered. TurboTax won't accept NR as an entry. How can I make the entry?

The TurboTax instructions say "NR" is a valid entry. My previous accountant always entered "NR". TurboTax is also preventing me from signing-off on the error. As I can neither enter information, nor sign off, the return has a prevent filing audit message. I would appreciate any help possible.