State tax filing

Thank you. If my wages should be treated as 100% sourced from NY, per your response, is my employer still required to withhold tax for NJ from my payroll?

 

If the answer is Yes, then it will result in too much tax being withheld for NJ and too little for NY (penalty and interest implications for my year end tax returns) even with 50/50 split between 2 states. If there any other way to get around this situation?

 

Thanks