First----you need to distinguish between Social Security and SSI---the are not the same thing---so which are you asking about? People often use the term "SSI" when they really mean Social Security benefits. It will make a difference in how we can answer you.
WHAT IS THE DIFFERENCE BETWEEN SOCIAL SECURITY BENEFITS AND SSI?
https://www.ssa.gov/ssi/text-over-ussi.htm
If your parent receives Social Security they get a SSA1099 in January. Social Security does not count as income if you are trying to figure out if you can claim your parent as a dependent. Medicare has nothing to do with it. Medicare premiums are money that is taken OUT of the person's Social Security--it is not taxable income.
If your parent qualifies to be a "qualifying relative" you get a $500 credit for other dependents which can lower your own tax bill. You do not get stimulus money for claiming your parent, nor will your parent receive stimulus money, since dependents do not qualify for stimulus checks. So be very sure you understand the criteria before you claim your parent as a dependent.
CREDIT FOR OTHER DEPENDENTS
https://ttlc.intuit.com/questions/4499708-what-is-the-500-credit-for-other-dependents-family-tax-cre...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
