If you entered your unemployment benefits from a 1099-G in 2020, that amount is not included in wages (line 15 of NJ 1040). NJ does not tax unemployment and amounts from a 1099-G would not be included on Line 15 - that line is for wages, salary, tips and other compensation and does not included unearned income (UE). If you have unemployment amounts reported on Line 15, you will need to file federal and state amendment. To file a state amendment, you have to start a federal amendment and make the changes there.
NJ does not tax UE benefits, but the IRS does. There was an exception in 2020 - the IRS allowed $10,200 of UE to be exempt from federal tax, but this did not have any effect on your NJ return, as those amounts are not taxed anyway.
@tb2004
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