A Schedule B needs to be attached to the Form $1040$ if a taxpayer:

received $$2,000$ from seller$-$financed mortgageA Schedule B needs to be attached to the Form $1040$ if a taxpayer:

received $$1,000$ of taxable interest in a financial account at a credit union

Does this situation accurately reflect the taxation of a taxpayer's Social Security benefits?

The maximum amount of Social Security received that may be taxable is $85\%.$