Income Taxed in Another State--Which figure to enter Box 1 or Box 16.

Quick query: I work in NJ but live in NY state. My income is from NJ and is taxed there. When I file the NY Tax return it asks: What  portion of your income is taxed by New Jersey. I have the NJ W2 and it lists 

Wages in Box 1

and in Box 16 State Wages. This number is higher as it includes monies that were directed to retirement 403 B acounts. Do I enter the "Amount Taxed By NJ" in Turbo Tax the amount listed in Box 1 or in Box 16. It makes a difference in terms of the amount of tax. 

 

Thanks!