CT Resident Return, New York non resident allocation

I completed my New York Nonresident return, because I work in NY. I am completing my CT resident return. Within the CT return, I am in the allocation section where it is asking about NY. The question is "Below are the amounts that transferred from your NY state return. Verify these amounts represent the income you earned while a resident of CT that were taxed by BOTH New York and Connecticut." It asks the same question for wages, interest, business income, etc. I'm not clear on what it is asking. Is it asking whether an employer withheld taxes already, or if I paid estimated taxes on those amounts?

Note: for us, all employment took place in NY, and appears on this screen under NY.

Interest and Dividends income should be taxed under CT, and are listed as $0 under NY.