what is the solution

in which of the following situations is the taxpayer not required to file a 2020 income tax return? When the taxpayer is a single 67-year-old with wages of $6,800. When an individual has a current year income tax refund and would like to obtain it. O When the taxpayer is a 35-year-old head of household with wages of $28,800. When the taxpayers are a married couple with both spouses under 65 years old with wages of $36,000, When the taxpayer is a 69-year-old widow (spouse died 3 years ago) with wages of $126,500 and no dependents