On the desktop version, it's asking me whether to exclude my primary business income or not, from my non-resident state return. (The purpose for the non-resident return in my case is a small amount of rental income in that non-resident state.)
On the web version in past years, I was never confronted with this question.
You can also see more details here:
https://ttlc.intuit.com/community/taxes/discussion/re-state-taxes-on-non-resi[product key removed]n-...
