MY friend win in gambling and has W-2G form. He has Income Security Income. Can the Prize($ 1800) of gambling affect on Social Security Income?

[Opus 17]

Once a person has reached their full retirement age, other income does not reduce the social security benefit.  However, additional income can make the social security benefit partly taxable.  There is a formula turbotax will use for this.  If this gambling income is their only other taxable income besides social security, it is not enough to make the social security taxable.