We have added the following calculators to help you estimate important tax elements such as federal income, capital gains/losses, estate tax liability and more.

2009 Tax Refund Estimator
2010 Tax Refund Estimator
Capital Gains (and Losses) Tax Calculator
Estate Tax Liability Calculator
Investment Interest Calculator
Itemize vs. Standard Deduction Calculator
Payroll Deductions Estimator
Self Employment Tax Estimator
Social Security Tax Calculator