@VolvoGirl
Think57 (the OP) cannot use the Tax Table because his income is over $100,000. He uses the Qualified Dividends and Capital Gain Tax Worksheet and the Tax Computation Worksheet. The Tax Computation Worksheet doesn't have sharp steps like the Tax Table does, so you don't get a jump in tax like you are describing. But side effects of adding income can still cause an increase in tax that is out of proportion to the added income.
