Unfortunately I don't have the Delaware tax return on my computer, so I'm guessing. But I think that if the program were asking for information from your previous year's return, it would specifically say so.
Also, did you complete your NJ non-resident return in full before you started your DE return? That's the only way the DE program would "know" your NJ information. In TurboTax, it's critical to complete your non-resident state return before you do your home state return (with a few exceptions involving California).
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
