@m_buchanan
The $4300 figure (it’s probably $4400 for 2022 but we haven’t seen the forms yet) refers to taxable income. If the elderly parent has more than $4300 of taxable income, then no one else can claim them as a dependent. Social Security is not taxable income if it is their only income. Social Security may be taxable depending on the amount of a person’s other income.
However, even if Social Security does not count as taxable income for the income test, it still counts as support the person provides themself for the support test.
