You have to provide more details. Where is the question that you are trying to respond to? What is the exact question? Did you get a letter from the New York State Department of Taxation and Finance? If so, what does the letter tell you to do?
What exactly is missing? Did you file a New York tax return for 2020?
Did you live in New York State in 2020, for all or part of the year? Did you have any income from a New York source in 2020, such as property or a business in New York State? Did you have any gambling winnings in New York State in 2020?
Did you get a W-2 for 2020 that has NY in box 15, even though you didn't work in New York? Did you work remotely (telecommuting) for a company that was located in New York?
Did you file a federal tax return for 2020? If so, did you put an address in New York State on the federal tax return?