@slava524 wrote:
Should I consider getting tax professional help to review and see if I have overpaid NJ tax due to this? Thank you again!
@slava524 It's too late to do anything about 2016 or earlier. The deadline for amending 2016 New Jersey tax returns was April 15, 2020. New Jersey did not extend that deadline. Take a look at the wages line on your 2017 and 2018 New Jersey tax returns and see if it's doubled. It's line 14 on your 2017 Form NJ-1040 and line 15 on your 2018 Form NJ-1040. If it's not doubled, your tax return was correct and there is nothing more to do. If the wages are doubled you should definitely file amended returns for those years. You could have a big refund coming.
You can't use TurboTax Online to amend a tax return for a prior year. If you used TurboTax Online for the year that you are amending, you would have to download and install the TurboTax software for each year that you have to amend. You would also have to download your .tax20xx data file for each year. Preparing an amended state tax return in TurboTax is not quite as straightforward as preparing your original tax returns. The following FAQs will get you started. If you think you can handle it yourself there is no need to go to a professional.
How do I amend my 2017 TurboTax Online return?
How do I amend my 2018 TurboTax Online return?
