Step one:
Print a paper copy of the NJ return you filed. That is a baseline.
If you want further instruction how to amend NJ yourself, see here:
https://www.nj.gov/treasury/taxation/pdf/current/1040xi.pdf
you don't need turbotax, but you need a revised, corrected NJ tax return for comparison.
if you can figure what went wrong with TurboTax, you can correct it and e-File NJ-1040-X.
Probably you just answered some quesiton(s) incorrectly.
@justin-and-vinh
