Received notice of additional tax due as result of forgetting to file spouse unemployment income on return. Notified of money due to Feds. How do I handle state returns?

You can amend the State to add this information. If the IRS did not require you to amend the Federal and made the adjustments for you, you can use the instructions below to "just" amend the State only.

I actually amended the Federal Return to generate the amended NYS and NJ returns before the response.

Make sure to keep a copy of the priginal. Actually doing the Federal amend is not a bad idea, but if you want to cancel the Federal Amendment here's a link with the steps: <a rel="nofollow" target="_blank" href="https://ttlc.intuit.com/questions/2552802">https://ttlc.intuit.com/questions/2552802</a>