If the person you want to claim as a dependent has no other income besides the Social Security, and you have provided over half their support all year, then they likely meet the criteria to be claimed as a qualified relative---for which you get the $500 credit for other dependents. If they have any OTHER income that exceeds $4700---from working, pensions, investment income, etc. etc.---- then you cannot claim them.
And....that person *might* be a qualifying dependent to allow you to file as Head of Household---if they are related to you. You have not mentioned who the person is. If it is a girlfriend or boyfriend, they cannot be your qualifying dependent for HOH filing status.
https://ttlc.intuit.com/questions/4499708-what-is-the-500-credit-for-other-dependents-family-tax-cre...
Am I Head of Household?
https://ttlc.intuit.com/questions/1894553-do-i-qualify-for-head-of-household
https://ttlc.intuit.com/questions/2900097-what-is-a-qualifying-person-for-head-of-household
If you qualify as Head of Household, when you enter your marital status (single or married filing separately) into MyInfo, and then enter your qualifying dependent, TurboTax will offer HOH as your filing status.
**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.**
