Hi ErnieSO,
I think I know the answer to this question, but along these same lines: If I decide to apply for the Phila. wage tax refund in say June of 2021 for 2020 taxes withheld (after I file my 2020 NJ taxes), when I amend my 2020 NJ return could I still be subject to the same penalty and interest for not having paid enough in the 2020 year?
