Filing a Nonresident Return in NJ

My business is a CA-based LLC and I file as an S-Corp. I make films and I was hired as a director by a NY-based company for a shoot last year. We shot for two days in New Jersey. Do I have to file a non-resident tax return in NJ? I tried to figure out how to do this on y taxes under state returns and it was trying to make me register my business as an NJ S-Corp, is that the only way?

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