2022 Income Taxes

I have not worked for a few years, but started working in 2022, it is part-time and I still get SSI. When I file, do I also add SSI in addition to My work? I understand just SSI you don't file, but I am confused cause I also work. Also, I am still married but have been separated for many years, I will fill separated, but I am asked what My spouses social security number is and I do not remember and have absolutely no contact, what do I put if it requires it? Thank you