The answers to your questions are in the Marketing Handbook, linked below.
Also, if you Google "Marketing Handbook HPD," you will see this handbook and also a whole lot of attachments, and some of them have to do with finances. So you if you don't see the answer in the main book, download the attachments.
The short answer is, your income will be calculated by averaging out your six most recent pay stubs. If you're retired and not getting paid, I don't know what happens.
Once you are in the apartment, your income doesn't matter.
Also, if you're taking withdrawals from an IRA or 401(k), that may count as income. But I'm not sure.
https://www1.nyc.gov/assets/hpd/down...dbook-8-21.pdf