2020 Amended NJ Estimated Payments

I amended my NJ 2020 tax form.  I owed a small amount.  However, I was sent estimated payment vouchers for Payments 2, 3, and 4 which were less than what I previously paid.  Does this mean I get a refund or do I actually pay the amounts listed in addition to what I have previously paid.  If I do get a refund, how will I receive it?  Thank you in advance.