If a single taxpayer earns $400,000 in taxable income and $2,000 in interest from an investment in State bonds how do I find Federal Tax, old tax rate, old taxable income to find the average tax rate, effective tax rate, and the current marginal tax rate. table being 0-11,000 10% 11,000-44,725 12% 44,725-95,375 22% 95,375-182,100 24% 182,100-231,250 32% 231,250-578,125 35%