@Presterjohn1118 wrote:
I have lived and worked in New York all year
In that case withholding NJ SUI and NJ SDI was a mistake. I'm not sure what, if anything, you can do about it at this point.
If it was purely the employer's error they should correct it. But you might not want to push your employer too hard over a few hundred dollars. If you are in a union, you could ask your union representative if they can help you.
On the other hand, it's hard to make a case that it was purely the employer's error. If you failed to notify your employer that you had moved, then it's entirely your error. Even if you did notify them, you should have noticed the erroneous deductions on your paycheck stubs last January, and gotten it corrected then. So you still bear some responsibility for the error.
As far as I know, New Jersey does not have any procedure for getting a refund of erroneously withheld tax by filing a New Jersey tax return. I don't know of any New Jersey form for claiming a refund in such a case. Normally it would be the employer who makes the correction and refunds the money to the employee.
