If they filed jointly, the tax would still be $30,813.

Had the couple been filing jointly, the tax would have applied only to $100,000, the difference between $500,000 and $600,000.

For married people filing jointly, the figures are $150,000 and $160,000.

For married people filing jointly, the limits are $54,000 and $64,000.

Many of the lawsuits are jointly filed against the Government and a corporation.

The teachers' union and a group of parents jointly filed a lawsuit to make the city keep schools in good repair.

A couple each earning $250,000 a year would pay $174,305 in taxes if they were married and filing jointly.

For married couples filing jointly, the income range is $150,000 to $160,000.

Sometimes couples filing jointly pay more in taxes than they would have if each person remained single.

The best example may be the decision by married couples to file jointly rather than separately.