The present invention relates to a tax simplification table product to convert all Tax Table and tax calculations into the simplification table product with filing status, taxable income, tax rate formula, tax rate range check, tax rate and tax calculations together. Tax rate formulas are connected with filing statuses. A calculated tax rate is examined and compared with its correct tax rate range, which avoid or reduce calculation mistakes. Related calculations are done automatically or manually. Automatic calculations are done by a calculator or computer software product. Manual calculations are done by paper work easily. Existing Tax Tables from federal and local governments are not needed. The Tax Tables are replaced by tax rate formulas. The tax simplification table product simplifies the existing government tax systems and save time and cost significantly for individuals, corporations and governments.