We would not be able to answer that question as it is not a tax question. You will need to contact SSI for the answer.
First----let's determine if you really are receiving SSI or if you get Social Security. Many people use the term "SSI" when they are really referring to Social Security benefits. If you get Social Security, you get a SSA1099 every year in January. Did you get a SSA1099? If you get SSI---Supplemental Security Income---then no tax document is sent to you.
WHAT IS THE DIFFERENCE BETWEEN SOCIAL SECURITY BENEFITS AND SSI?
https://www.ssa.gov/ssi/text-over-ussi.htm
If you get Social Security, then your monthly benefits are not going to be affected by the money from selling your house.
If you get SSI, then, you do not have a tax question---- you do have a question for SSI. There are indeed strict rules in effect for SSI pertaining to how much money you can have in a bank account, etc. and still receive monthly SSI benefits. We cannot advise you about that.